gwlw

gylfau (plural)
gylfon (plural)
gwlw (mutation mutation-radical)
wlw (mutation mutation-soft)
ngwlw (mutation mutation-nasal)


symffoni

cy-noun

symffoni f (plural symffonïau, not mutable)

Borrowed from English symphony, from Latin symphonia.


symffonig

cy-adj

symffonig (feminine singular symffonig, plural symffonig, equative mor symffonig, comparative mwy symffonig, superlative mwyaf symffonig, not mutable)

symffonig (feminine singular)
symffonig (plural)
mor symffonig (equative)
mwy symffonig (comparative)
mwyaf symffonig (superlative)


Bermwdiad

cy-noun

Bermwdiad m or f by sense (plural Bermwdiaid)

Bermudian (native or inhabitant of Bermuda)


anufudd-dod sifil

anufudd-dod sifil (mutation mutation-radical)
hanufudd-dod sifil (mutation prothesis-h)

Mae plaid asgell chwith o Gatalwnia sydd yn cefnogi annibyniaeth, wedi galw ar ddinasyddion i wrthwynebu Sbaen trwy “anufudd-dod sifil”.

The left-wing party of Catalonia, which supports independence, has called on citizens to oppose Spain through "civil disobedience".


rhewgist

rhewgistiau (plural)
rhewgist (mutation mutation-radical)
rewgist (mutation mutation-soft)


hydred

hydredau (plural)
hydred (mutation mutation-radical)


lledred

lledred m (plural lledredau or lledredion)

lledredau (plural)
lledredion (plural)
lledred (mutation mutation-radical)
ledred (mutation mutation-soft)


dwyfol

cy-adj

dwyfol (feminine singular dwyfol, plural dwyfol, equative mor ddwyfol, comparative mwy dwyfol, superlative mwyaf dwyfol)

dwyfol (feminine singular)
dwyfol (plural)
mor ddwyfol (equative)
mwy dwyfol (comparative)
mwyaf dwyfol (superlative)


merfaidd

merfaidd (feminine singular merfaidd, plural merfaidd, equative mor ferfaidd, comparative mwy merfaidd, superlative mwyaf merfaidd)

merfaidd (feminine singular)
merfaidd (plural)
mor ferfaidd (equative)
mwy merfaidd (comparative)
mwyaf merfaidd (superlative)
merfaidd (mutation mutation-radical)
ferfaidd (mutation mutation-soft)


amaethydd

cy-noun

amaethydd m or f by sense (plural amaethyddion or amaethwyr)

amaethyddion (plural)
amaethwyr (plural)
amaethydd (mutation mutation-radical)
hamaethydd (mutation prothesis-h)

From amaethu (“cultivate, farm”) + -ydd.


datgysylltu

cy-verb

datgysylltu (first-person singular present datgysylltaf)

datgysylltaf (first-person present singular)
datgysylltaf (first-person future indicative present singular)
datgysyllti (future indicative present second-person singular)
datgysyllta (future indicative present singular third-person)
datgysylltwn (first-person future indicative plural present)
datgysylltwch (future indicative plural present second-person)
datgysylltant (future indicative plural present third-person)
datgysylltir (future impersonal indicative present)
datgysylltwn (conditional first-person singular)
datgysylltwn (first-person imperfect indicative singular subjunctive)
datgysylltit (conditional second-person singular)
datgysylltit (imperfect indicative second-person singular subjunctive)
datgysylltai (conditional singular third-person)
datgysylltai (imperfect indicative singular subjunctive third-person)
datgysylltem (conditional first-person plural)
datgysylltem (first-person imperfect indicative plural subjunctive)
datgysylltech (conditional plural second-person)
datgysylltech (imperfect indicative plural second-person subjunctive)
datgysylltent (conditional plural third-person)
datgysylltent (imperfect indicative plural subjunctive third-person)
datgysylltid (conditional impersonal)
datgysylltid (imperfect impersonal indicative subjunctive)
datgysylltais (first-person preterite singular)
datgysylltaist (preterite second-person singular)
datgysylltodd (preterite singular third-person)
datgysylltasom (first-person plural preterite)
datgysylltasoch (plural preterite second-person)
datgysylltasant (plural preterite third-person)
datgysylltwyd (impersonal preterite)
datgysylltaswn (first-person pluperfect singular)
datgysylltasit (pluperfect second-person singular)
datgysylltasai (pluperfect singular third-person)
datgysylltasem (first-person pluperfect plural)
datgysylltasech (pluperfect plural second-person)
datgysylltasent (pluperfect plural third-person)
datgysylltasid (impersonal pluperfect)
datgysylltesid (impersonal pluperfect)
datgysylltwyf (first-person present singular subjunctive)
datgysylltych (present second-person singular subjunctive)
datgysyllto (present singular subjunctive third-person)
datgysylltom (first-person plural present subjunctive)
datgysylltoch (plural present second-person subjunctive)
datgysylltont (plural present subjunctive third-person)
datgysyllter (impersonal present subjunctive)
datgysyllta (imperative second-person singular)
datgysyllted (imperative singular third-person)
datgysylltwn (first-person imperative plural)
datgysylltwch (imperative plural second-person)
datgysylltent (imperative plural third-person)
datgysyllter (imperative impersonal)
datgysylltu (noun-from-verb)
datgysylltedig (participle)
datgysylltadwy (participle)
datgysyllta i (first-person future singular)
datgysylltaf i (first-person future singular)
datgysyllti di (future second-person singular)
datgysylltith o (future singular third-person)
e (future singular third-person)
hi (future singular third-person)
datgysylltiff e (future singular third-person)
datgysylltwn ni (first-person future plural)
datgysylltwch chi (future plural second-person)
datgysylltan nhw (future plural third-person)
datgysylltwn i (conditional first-person singular)
datgysylltswn i (conditional first-person singular)
datgysylltet ti (conditional second-person singular)
datgysylltset ti (conditional second-person singular)
datgysylltai fo (conditional singular third-person)
fe (conditional singular third-person)
hi (conditional singular third-person)
datgysylltsai fo (conditional singular third-person)
datgysyllten ni (conditional first-person plural)
datgysylltsen ni (conditional first-person plural)
datgysylltech chi (conditional plural second-person)
datgysylltsech chi (conditional plural second-person)
datgysyllten nhw (conditional plural third-person)
datgysylltsen nhw (conditional plural third-person)
datgysylltais i (first-person preterite singular)
datgysylltes i (first-person preterite singular)
datgysylltaist ti (preterite second-person singular)
datgysylltest ti (preterite second-person singular)
datgysylltodd o (preterite singular third-person)
e (preterite singular third-person)
hi (preterite singular third-person)
datgysyllton ni (first-person plural preterite)
datgysylltoch chi (plural preterite second-person)
datgysyllton nhw (plural preterite third-person)
datgysyllta (imperative second-person singular)
datgysylltwch (imperative plural second-person)


dychanol

cy-adj

dychanol (feminine singular dychanol, plural dychanol, equative mor ddychanol, comparative mwy dychanol, superlative mwyaf dychanol)

dychanol (feminine singular)
dychanol (plural)
mor ddychanol (equative)
mwy dychanol (comparative)
mwyaf dychanol (superlative)
dychanol (mutation mutation-radical)
ddychanol (mutation mutation-soft)
nychanol (mutation mutation-nasal)


dychan

dychanau (plural)
dychan (mutation mutation-radical)
ddychan (mutation mutation-soft)
nychan (mutation mutation-nasal)


bleidd-ddyn

cy-noun

bleidd-ddyn m (plural bleidd-ddynion or blaidd-ddynion)

bleidd-ddynion (plural)
blaidd-ddynion (plural)
bleidd-ddyn (mutation mutation-radical)
fleidd-ddyn (mutation mutation-soft)
mleidd-ddyn (mutation mutation-nasal)


crymedd

crymeddau (plural)
crymedd (mutation mutation-radical)
grymedd (mutation mutation-soft)
nghrymedd (mutation mutation-nasal)
chrymedd (mutation mutation-aspirate)

Inherited from Middle Welsh krymmed. By surface analysis, crwm + -edd.


dychanu

cy-verb

dychanu (first-person singular present dychanaf)

dychanaf (first-person present singular)
dychanaf (first-person future indicative present singular)
dycheni (future indicative present second-person singular)
dychan (future indicative present singular third-person)
dychana (future indicative present singular third-person)
dychanwn (first-person future indicative plural present)
dychenwch (future indicative plural present second-person)
dychanwch (future indicative plural present second-person)
dychanant (future indicative plural present third-person)
dychenir (future impersonal indicative present)
dychanwn (conditional first-person singular)
dychanwn (first-person imperfect indicative singular subjunctive)
dychanit (conditional second-person singular)
dychanit (imperfect indicative second-person singular subjunctive)
dychanai (conditional singular third-person)
dychanai (imperfect indicative singular subjunctive third-person)
dychanem (conditional first-person plural)
dychanem (first-person imperfect indicative plural subjunctive)
dychanech (conditional plural second-person)
dychanech (imperfect indicative plural second-person subjunctive)
dychanent (conditional plural third-person)
dychanent (imperfect indicative plural subjunctive third-person)
dychenid (conditional impersonal)
dychenid (imperfect impersonal indicative subjunctive)
dychenais (first-person preterite singular)
dychenaist (preterite second-person singular)
dychanodd (preterite singular third-person)
dychanasom (first-person plural preterite)
dychanasoch (plural preterite second-person)
dychanasant (plural preterite third-person)
dychanwyd (impersonal preterite)
dychanaswn (first-person pluperfect singular)
dychanasit (pluperfect second-person singular)
dychanasai (pluperfect singular third-person)
dychanasem (first-person pluperfect plural)
dychanasech (pluperfect plural second-person)
dychanasent (pluperfect plural third-person)
dychanasid (impersonal pluperfect)
dychanesid (impersonal pluperfect)
dychanwyf (first-person present singular subjunctive)
dychenych (present second-person singular subjunctive)
dychano (present singular subjunctive third-person)
dychanom (first-person plural present subjunctive)
dychanoch (plural present second-person subjunctive)
dychanont (plural present subjunctive third-person)
dychaner (impersonal present subjunctive)
dychan (imperative second-person singular)
dychana (imperative second-person singular)
dychaned (imperative singular third-person)
dychanwn (first-person imperative plural)
dychenwch (imperative plural second-person)
dychanwch (imperative plural second-person)
dychanent (imperative plural third-person)
dychaner (imperative impersonal)
dychanu (noun-from-verb)
dychanedig (participle)
dychanadwy (participle)
dychana i (first-person future singular)
dychanaf i (first-person future singular)
dychani di (future second-person singular)
dychanith o (future singular third-person)
e (future singular third-person)
hi (future singular third-person)
dychaniff e (future singular third-person)
dychanwn ni (first-person future plural)
dychanwch chi (future plural second-person)
dychanan nhw (future plural third-person)
dychanwn i (conditional first-person singular)
dychanswn i (conditional first-person singular)
dychanet ti (conditional second-person singular)
dychanset ti (conditional second-person singular)
dychanai fo (conditional singular third-person)
fe (conditional singular third-person)
hi (conditional singular third-person)
dychansai fo (conditional singular third-person)
dychanen ni (conditional first-person plural)
dychansen ni (conditional first-person plural)
dychanech chi (conditional plural second-person)
dychansech chi (conditional plural second-person)
dychanen nhw (conditional plural third-person)
dychansen nhw (conditional plural third-person)
dychanais i (first-person preterite singular)
dychanes i (first-person preterite singular)
dychanaist ti (preterite second-person singular)
dychanest ti (preterite second-person singular)
dychanodd o (preterite singular third-person)
e (preterite singular third-person)
hi (preterite singular third-person)
dychanon ni (first-person plural preterite)
dychanoch chi (plural preterite second-person)
dychanon nhw (plural preterite third-person)
dychana (imperative second-person singular)
dychanwch (imperative plural second-person)

(transitive) to satirize, mock, ridicule


llaw dde

Gwynebu partner a dal dwylo de i dde a chwith i chwith.

Face your partner and take their right hands in your right and their left in your left.


gwerth marchnadol

cy-noun

gwerth marchnadol m (plural gwerthoedd marchnadol)

gwerthoedd marchnadol (plural)
gwerth marchnadol (mutation mutation-radical)
werth marchnadol (mutation mutation-soft)
ngwerth marchnadol (mutation mutation-nasal)


marchnadol

cy-adj

marchnadol (feminine singular marchnadol, plural marchnadol, equative mor farchnadol, comparative mwy marchnadol, superlative mwyaf marchnadol)

marchnadol (feminine singular)
marchnadol (plural)
mor farchnadol (equative)
mwy marchnadol (comparative)
mwyaf marchnadol (superlative)
marchnadol (mutation mutation-radical)
farchnadol (mutation mutation-soft)

(relational) market; commercial, mercantile


cnwc

cy-noun

cnwc m (plural cnyciau, diminutive cnwcyn or cnycyn)

cnyciau (plural)
cnwcyn (diminutive)
cnycyn (diminutive)
cnwc (mutation mutation-radical)
gnwc (mutation mutation-soft)
nghnwc (mutation mutation-nasal)
chnwc (mutation mutation-aspirate)

From Old Irish cnocc (“hill, lump, ulcer”).

Sexdecimal, a. (Ll. sex a decem) âg iddo 6 wyneb a dau gwnwg; âg iddo ddeg wyneb.

1858, Daniel Silvan Evans, An English and Welsh dictionary, adapted to the present state of science and literature; in which the English words are deduced from their originals, and explained by their synonyms, in the Welsh language., volume II: H–Z (overall work in English and Welsh), Denbigh · London: Thomas Gee · Simpkin & Marshall, page 790/2, s.v. “Sexdecimal, a.”:

Sexdecimal, a. (L. sex and decem) having 6 faces and two summits; having ten faces.

(crystallography) a summit (each of the two vertices of a rhombohedral crystal having equangular faces)


astell

astell f (plural estyll or astelloedd or astellau or astelli)

estyll (plural)
astelloedd (plural)
astellau (plural)
astelli (plural)
astell (mutation mutation-radical)
hastell (mutation prothesis-h)


ffilm fer

ffilm fer f (plural ffilmiau byrion, not mutable)


rhwymyn tynhau

rhwymyn tynhau m (plural rhwymynnau tynhau)

rhwymynnau tynhau (plural)
rhwymyn tynhau (mutation mutation-radical)
rwymyn tynhau (mutation mutation-soft)


breinryddid

breinrhyddidau (plural)
breinryddid (mutation mutation-radical)
freinryddid (mutation mutation-soft)
mreinryddid (mutation mutation-nasal)

From braint (“privilege”) + rhyddid (“freedom”).


diplomydd

cy-noun

diplomydd m or f by sense (plural diplomyddion)

diplomyddion (plural)
diplomydd (mutation mutation-radical)
ddiplomydd (mutation mutation-soft)
niplomydd (mutation mutation-nasal)


harmonig

cy-adj

harmonig (feminine singular harmonig, plural harmonig, equative mor harmonig, comparative mwy harmonig, superlative mwyaf harmonig, not mutable)

harmonig (feminine singular)
harmonig (plural)
mor harmonig (equative)
mwy harmonig (comparative)
mwyaf harmonig (superlative)


harmonig

cy-noun

harmonig m (plural harmonigau, not mutable)


Siôr

a male given name, equivalent to English George


morffogystrawen

morffogystrawen (mutation mutation-radical)
forffogystrawen (mutation mutation-soft)


cystrawen

constrawennau (plural)
cystrawen (mutation mutation-radical)
gystrawen (mutation mutation-soft)
nghystrawen (mutation mutation-nasal)
chystrawen (mutation mutation-aspirate)

From Latin cōnstruendā through a variant form *cōnstrauendā.


hashnod

hashnod m (plural hashnodau, not mutable)

Hyrwyddo'r ymgyrch drwy eich cyfrifon cymdeithasol eich hunain gan ddefnyddio'r hashnod.

c. 2020, Denbighshire County Council, “Caru Busnesau Lleol”, in denbighshire.gov.uk:

Promote the campaign through your own social accounts using the hashtag.

Gwahodd lleoliadau celfyddydol i ymuno ag ymgyrch #hashnod
Gwahoddir lleoliadau celfyddydol sy'n bwriadu ailagor i ddefnyddio'r hashnodau #celfaragor neu #artsareopen

2021 May 26, Arts Council of Wales, “Our News”, in arts.wales, retrieved 2024-06-16:

Invite arts venues to join the #hashtag campaign
Arts venues planning to reopen are invited to use the hashtags #celfaragor or #artsareopen

hashtag (a metadata tag used to label content)


Cadfael

Cadfael (mutation mutation-radical)
Gadfael (mutation mutation-soft)
Nghadfael (mutation mutation-nasal)
Chadfael (mutation mutation-aspirate)


Prydwen

Prydwen (mutation mutation-radical)
Brydwen (mutation mutation-soft)
Mhrydwen (mutation mutation-nasal)
Phrydwen (mutation mutation-aspirate)

From Middle Welsh Prydwen, from pryd (“appearance, shape, form”) + gwenn, feminine of gwynn (“white, fair”).

(Arthurian legend) the ship of King Arthur.


anhwylder personoliaeth gwrthgymdeithasol m (uncountable)

antisocial personality disorder
antisocial personality disorder


personoliaeth

personoliaeth f (plural personoliaethau)

personoliaethau (plural)
personoliaeth (mutation mutation-radical)
bersonoliaeth (mutation mutation-soft)
mhersonoliaeth (mutation mutation-nasal)
phersonoliaeth (mutation mutation-aspirate)


gwladych

gwladych (mutation mutation-radical)
wladych (mutation mutation-soft)
ngwladych (mutation mutation-nasal)


mesur diodl

mesur diodl (mutation mutation-radical)
fesur diodl (mutation mutation-soft)

From mesur (“measure; metre”) + diodl (“rhymeless”).


penrhydd

cy-adj

penrhydd (feminine singular penrhydd, plural penrhydd, equative mor benrhydd, comparative mwy penrhydd, superlative mwyaf penrhydd)

penrhydd (feminine singular)
penrhydd (plural)
mor benrhydd (equative)
mwy penrhydd (comparative)
mwyaf penrhydd (superlative)
penrhydd (mutation mutation-radical)
benrhydd (mutation mutation-soft)
mhenrhydd (mutation mutation-nasal)
phenrhydd (mutation mutation-aspirate)


diodl

diodl (feminine singular diodl, plural diodl, unknown comparative)

diodl (feminine singular)
diodl (plural)


tor heddwch

tor heddwch (mutation mutation-radical)
dor heddwch (mutation mutation-soft)
nhor heddwch (mutation mutation-nasal)
thor heddwch (mutation mutation-aspirate)


tor diogelwch data

cy-noun

tor diogelwch data m (plural toriadau diogelwch data)

Gall toriadau diogelwch data effeithio'n andwyol ar hyder y cyhoedd.

Data breaches can adversely affect public confidence.


rhefrolch

rhefrolchion (plural)
rhefrolch (mutation mutation-radical)
refrolch (mutation mutation-soft)

From rhefr (“rectum”) + golch (“washing”).


bom amser

bomiau amser (plural)
bom amser (mutation mutation-radical)
fom amser (mutation mutation-soft)
mom amser (mutation mutation-nasal)


lens gyffwrdd

lens gyffwrdd f (plural lensiau cyffwrdd, not mutable)


bollt

bolltau (plural)
bolltiau (plural)
bollt (mutation mutation-radical)
follt (mutation mutation-soft)
mollt (mutation mutation-nasal)


taranfollt

taranfollt f (plural taranfolltau or taranfyllt)

taranfolltau (plural)
taranfyllt (plural)
taranfollt (mutation mutation-radical)
daranfollt (mutation mutation-soft)
nharanfollt (mutation mutation-nasal)
tharanfollt (mutation mutation-aspirate)

From taran (“thunder”) + bollt (“bolt”), calque of English thunderbolt.


gweithredol

cy-adj

gweithredol (feminine singular gweithredol, plural gweithredol, equative mor weithredol, comparative mwy gweithredol, superlative mwyaf gweithredol)

gweithredol (feminine singular)
gweithredol (plural)
mor weithredol (equative)
mwy gweithredol (comparative)
mwyaf gweithredol (superlative)
gweithredol (mutation mutation-radical)
weithredol (mutation mutation-soft)
ngweithredol (mutation mutation-nasal)


niwsans

Borrowed from English nuisance, from Old French nuisance.


hoelbren

cy-noun

hoelbren m or f (plural hoelbrennau, not mutable)


uniad meitr

uniadau meitr (plural)
uniad meitr (mutation mutation-radical)
huniad meitr (mutation prothesis-h)


uniad meitrog

uniad meitrog m (plural uniadau meitrog)

uniadau meitrog (plural)
uniad meitrog (mutation mutation-radical)
huniad meitrog (mutation prothesis-h)


meitr

meitrau (plural)
meitr (mutation mutation-radical)
feitr (mutation mutation-soft)


meitrog

cy-adj

meitrog (feminine singular meitrog, plural meitrogion, not comparable)

meitrog (feminine singular)
meitrogion (plural)
meitrog (mutation mutation-radical)
feitrog (mutation mutation-soft)


uniad ffrâm

uniadau ffrâm (plural)
uniad ffrâm (mutation mutation-radical)
huniad ffrâm (mutation prothesis-h)


sgaffald

cy-noun

sgaffald m (plural sgaffaldau or sgaffaldiau, not mutable)

sgaffaldau (plural)
sgaffaldiau (plural)


uniad bagl

uniadau bagl (plural)
uniad bagl (mutation mutation-radical)
huniad bagl (mutation prothesis-h)

uniad (“joint”) + bagl (“crook, crutch”).


uniad bôn

uniadau bôn (plural)
uniad bôn (mutation mutation-radical)
huniad bôn (mutation prothesis-h)


uniad rhigol

uniadau rhigol (plural)
uniad rhigol (mutation mutation-radical)
huniad rhigol (mutation prothesis-h)


uniad setiau

uniadau setiau (plural)
uniad setiau (mutation mutation-radical)
huniad setiau (mutation prothesis-h)


uniad tafod a rhych

uniad tafod a rhych m (plural uniadau tafod a rhych)

uniadau tafod a rhych (plural)
uniad tafod a rhych (mutation mutation-radical)
huniad tafod a rhych (mutation prothesis-h)

uniad (“joint”) + tafod (“tongue”) + rhych (“groove”).

tongue and groove joint
tongue and groove joint


uniad tafod a rhigol

uniad tafod a rhigol m (plural uniadau tafod a rhigol)

uniadau tafod a rhigol (plural)
uniad tafod a rhigol (mutation mutation-radical)
huniad tafod a rhigol (mutation prothesis-h)

uniad (“joint”) + tafod (“tongue”) + rhigol (“groove”).


uslennog

cy-adj

uslennog (feminine singular uslennog, plural uslennog, not comparable)

uslennog (feminine singular)
uslennog (plural)
uslennog (mutation mutation-radical)
huslennog (mutation prothesis-h)


casul

cy-noun

casul m or f (plural casulai or casuliau)

casulai (plural)
casuliau (plural)
casul (mutation mutation-radical)
gasul (mutation mutation-soft)
nghasul (mutation mutation-nasal)
chasul (mutation mutation-aspirate)


uniad hoelbren

uniad hoelbren m (plural uniadau hoelbren)

uniadau hoelbren (plural)
uniad hoelbren (mutation mutation-radical)
huniad hoelbren (mutation prothesis-h)


uniad cynffonnog

uniad cynffonnog m (plural uniadau cynffonnog)

uniadau cynffonnog (plural)
uniad cynffonnog (mutation mutation-radical)
huniad cynffonnog (mutation prothesis-h)


uniad hanerog

uniad hanerog m (plural uniadau hanerog)

uniadau hanerog (plural)
uniad hanerog (mutation mutation-radical)
huniad hanerog (mutation prothesis-h)


uniad haneru

uniadau haneru (plural)
uniad haneru (mutation mutation-radical)
huniad haneru (mutation prothesis-h)


uslen

uslenion (plural)
uslennau (plural)
uslen (mutation mutation-radical)
huslen (mutation prothesis-h)

us (“chaff, husks”) + llen (“covering”).


gêr

gêr m or f (plural gerau or geriau or gêrs)

gerau (plural)
geriau (plural)
gêrs (plural)
gêr (mutation mutation-radical)
ngêr (irregular mutation mutation-nasal)


gyriant cripian

gyriant cripian m (plural gyriannau cripian)


ceuffon

From cau (“hollow, empty”) + ffon (“stick, lance”).


gyriant cadwyn

cy-noun

gyriant cadwyn m (plural gyriannau cadwyn)

(mechanics) chain drive, chain transmission


olwyn gêr

olwynion gêrau (plural)
olwyn gêr (mutation mutation-radical)
holwyn gêr (mutation prothesis-h)


hydoddiant byffer

hydoddiant byffer m (plural hydoddiannau byffer, not mutable)


cyplwr

cyplwyr (plural)
cyplwr (mutation mutation-radical)
gyplwr (mutation mutation-soft)
nghyplwr (mutation mutation-nasal)
chyplwr (mutation mutation-aspirate)

From cyplu (“to couple”) + -wr, a calque of English coupler.


uniad mortais a thyno

uniad mortais a thyno m (plural uniadau mortais a thyno)

uniadau mortais a thyno (plural)
uniad mortais a thyno (mutation mutation-radical)
huniad mortais a thyno (mutation prothesis-h)

uniad (“joint”) + mortais (“mortise”) + tyno (“tenon”).

mortise and tenon joint
mortise and tenon joint


cyplydd

cyplyddion (plural)
cyplydd (mutation mutation-radical)
gyplydd (mutation mutation-soft)
nghyplydd (mutation mutation-nasal)
chyplydd (mutation mutation-aspirate)

From cyplu (“to couple”) + -ydd, a calque of English coupler.


byffer

hydoddiant byffer
hydoddiant byffer#Welsh

buffer (something used to isolate or minimise the impact of one thing on another)

(physical chemistry) clipping of hydoddiant byffer. buffer solution


cymhareb gêr

cymarebau gêrau (plural)
cymhareb gêr (mutation mutation-radical)
gymhareb gêr (mutation mutation-soft)
nghymhareb gêr (mutation mutation-nasal)
chymhareb gêr (mutation mutation-aspirate)


trên gêr

trenau gêrau (plural)
trên gêr (mutation mutation-radical)
drên gêr (mutation mutation-soft)
nhrên gêr (mutation mutation-nasal)
thrên gêr (mutation mutation-aspirate)


cymhareb

cymarebau (plural)
cymhareb (mutation mutation-radical)
gymhareb (mutation mutation-soft)
nghymhareb (mutation mutation-nasal)
chymhareb (mutation mutation-aspirate)


sudd tomato

sudd tomato m (uncountable, not mutable)


llywle

llywleoedd (plural)
llywle (mutation mutation-radical)
lywle (mutation mutation-soft)


trefniad

trefniadau (plural)
trefniad (mutation mutation-radical)
drefniad (mutation mutation-soft)
nhrefniad (mutation mutation-nasal)
threfniad (mutation mutation-aspirate)

trefnu (“to arrange, to ordain”) + -iad.


crynddail

cy-adj

crynddail (feminine singular crynddail, plural crynddail, not comparable)

crynddail (feminine singular)
crynddail (plural)
crynddail (mutation mutation-radical)
grynddail (mutation mutation-soft)
nghrynddail (mutation mutation-nasal)
chrynddail (mutation mutation-aspirate)

(botany) round-leaved, having round leaves


dauwynebog

dauwynebog (mutation mutation-radical)
ddauwynebog (mutation mutation-soft)
nauwynebog (mutation mutation-nasal)

From dau (“two”) + wyneb (“face”) + -og.

Viola tricolor
Viola tricolor#Translingual

(botany) pansy, heartsease (Viola tricolor)


tro pedol

troeon pedol (plural)
tro pedol (mutation mutation-radical)
dro pedol (mutation mutation-soft)
nhro pedol (mutation mutation-nasal)
thro pedol (mutation mutation-aspirate)


parddu briallu

parddu briallu (mutation mutation-radical)
barddu briallu (mutation mutation-soft)
mharddu briallu (mutation mutation-nasal)
pharddu briallu (mutation mutation-aspirate)

parddu (“smut”) + briallu (“primroses”).

Cymdeithas Edward Llwyd
w:Cymdeithas Edward Llwyd

Gwasg Carreg Gwalch
w:Gwasg Carreg Gwalch

(phytopathology) bird's-eye-primrose smut (Urocystis primulicola)


annwn

annwn (mutation mutation-radical)
hannwn (mutation prothesis-h)

(mythology) underworld, netherworld, fairyland


pengoch

pengoch (mutation mutation-radical)
bengoch (mutation mutation-soft)
mhengoch (mutation mutation-nasal)
phengoch (mutation mutation-aspirate)

(botany) Lamioideae (deadnettles and horehounds)

Acanthis flammea
Acanthis flammea#Translingual

(ornithology) redpoll (Acanthis), especially common redpoll (Acanthis flammea)


meinddail

meinddail (feminine singular meinddail, plural meinddail, not comparable)

meinddail (feminine singular)
meinddail (plural)
meinddail (mutation mutation-radical)
feinddail (mutation mutation-soft)

(botany) narrow-leaved, having narrow leaves

dyfrllys meinddail

slender-leaved pondweed; sharp-leaved pondweed


crwst pwff

crwst pwff (mutation mutation-radical)
grwst pwff (mutation mutation-soft)
nghrwst pwff (mutation mutation-nasal)
chrwst pwff (mutation mutation-aspirate)


crwst brau

crwst brau (mutation mutation-radical)
grwst brau (mutation mutation-soft)
nghrwst brau (mutation mutation-nasal)
chrwst brau (mutation mutation-aspirate)


teisen frau

teisen frau (mutation mutation-radical)
deisen frau (mutation mutation-soft)
nheisen frau (mutation mutation-nasal)
theisen frau (mutation mutation-aspirate)


iyrchell

cy-noun

iyrchell f (plural iyrchellau or iyrchellod, masculine iwrch)

iyrchellau (plural)
iyrchellod (plural)
iwrch (masculine)
iyrchell (mutation mutation-radical)
hiyrchell (mutation prothesis-h)

Capreolus capreolus
Capreolus capreolus#Translingual


Swrinamiad

Swrinamiad m or f by sense (plural Swrinamiaid, not mutable)

Surinamese (native or inhabitant of Suriname)


cysb

(veterinary medicine) grass tetany, the staggers


iyrches

iyrches f (plural iyrchesod, masculine iwrch)

iyrchesod (plural)
iwrch (masculine)
iyrches (mutation mutation-radical)
hiyrches (mutation prothesis-h)


ceginfa

ceginfa f (plural ceginfâu or ceginfeydd)

ceginfâu (plural)
ceginfeydd (plural)
ceginfa (mutation mutation-radical)
geginfa (mutation mutation-soft)
ngheginfa (mutation mutation-nasal)
cheginfa (mutation mutation-aspirate)

(nautical) galley, caboose (cookroom aboard a ship)


llathrlwch

llathrlwch (mutation mutation-radical)
lathrlwch (mutation mutation-soft)

emery (form of corundum ore used to polish metal)


Aranrhod

Aranrhod (mutation mutation-radical)
Haranrhod (mutation prothesis-h)


Arddun

Arddun (mutation mutation-radical)
Harddun (mutation prothesis-h)

a female given name from arddun (“beautiful”)


Ardudfyl

Ardudfyl (mutation mutation-radical)
Hardudfyl (mutation prothesis-h)


Aranwen

Aranwen (mutation mutation-radical)
Haranwen (mutation prothesis-h)


Ardudwen

Ardudwen (mutation mutation-radical)
Hardudwen (mutation prothesis-h)


Arawn

Arawn (mutation mutation-radical)
Harawn (mutation prothesis-h)

From Middle Welsh Arawn, from Old Welsh Araun, from Proto-Brythonic *Arọn, from Latin Aarōn, from Hebrew אהרן (“Aaron”).


Aranwy

Aranwy (mutation mutation-radical)
Haranwy (mutation prothesis-h)


Arfonia

Arfonia (mutation mutation-radical)
Harfonia (mutation prothesis-h)

a female given name, masculine equivalent Arfon


Arfon

Arfon (mutation mutation-radical)
Harfon (mutation prothesis-h)

a male given name, feminine equivalent Arfona or Arfonia


Ariannell

Ariannell (mutation mutation-radical)
Hariannell (mutation prothesis-h)

a female given name from arian (“silver”)


Arfor

Arfor (mutation mutation-radical)
Harfor (mutation prothesis-h)

a male given name transferred from the place name


Arfona

Arfona (mutation mutation-radical)
Harfona (mutation prothesis-h)


Arfryn

Arfryn (mutation mutation-radical)
Harfryn (mutation prothesis-h)


Arianina

Arianina (mutation mutation-radical)
Harianina (mutation prothesis-h)

a female given name transferred from the place name, variant of Ariannin


Arnallt

Arnallt (mutation mutation-radical)
Harnallt (mutation prothesis-h)

a male given name, equivalent to English Arnold; variant form Arnall


Arddur

Arddur (mutation mutation-radical)
Harddur (mutation prothesis-h)


Arianwyn

Arianwyn (mutation mutation-radical)
Harianwyn (mutation prothesis-h)

From arian (“silver”) + gwyn (“blessed”).


Arianwen

Arianwen (mutation mutation-radical)
Harianwen (mutation prothesis-h)

From arian (“silver”) + gwen (“blessed”).


Arofan

Arofan (mutation mutation-radical)
Harofan (mutation prothesis-h)


Arthien

Arthien (mutation mutation-radical)
Harthien (mutation prothesis-h)


Arthen

Arthen (mutation mutation-radical)
Harthen (mutation prothesis-h)


Arwenna

Arwenna (mutation mutation-radical)
Harwenna (mutation prothesis-h)

From ar- (intensifying prefix) + gwen (“blessed”).


Arwen

Arwen (mutation mutation-radical)
Harwen (mutation prothesis-h)

a female given name, masculine equivalent Arwyn; variant form Arwenna


ffurfdroad

cy-noun

ffurfdroad m (plural ffurfdroadau, not mutable)

ffurf (“form, shape”) + troad (“rotation”)


Artro

Artro (mutation mutation-radical)
Hartro (mutation prothesis-h)


dafaty

dafatai (plural)
dafaty (mutation mutation-radical)
ddafaty (mutation mutation-soft)
nafaty (mutation mutation-nasal)

dafad (“sheep”) + tŷ (“house, dwelling”).


defeity

defeitai (plural)
defeity (mutation mutation-radical)
ddefeity (mutation mutation-soft)
nefeity (mutation mutation-nasal)

defaid (“sheep (pl.)”) + tŷ (“house, dwelling”).


treiglad caled

cy-noun

treiglad caled m (plural treigladau caled or treigladau caledion)

treigladau caled (plural)
treigladau caledion (plural)
treiglad caled (mutation mutation-radical)
dreiglad caled (mutation mutation-soft)
nhreiglad caled (mutation mutation-nasal)
threiglad caled (mutation mutation-aspirate)

(linguistics, countable) hard mutation, provection, fortition


daearlun

daearluniau (plural)
daearlun (mutation mutation-radical)
ddaearlun (mutation mutation-soft)
naearlun (mutation mutation-nasal)

Edrychwn y gyntaf ar y ddaearlun […]

1920, Robert Griffith, “Prawfion (Ordeals)”, in Chwedl a Hanes o Ynys y Merthyron [History and Stories from the Island of Martyrs], London: Cymdeithas Gynhadol Llundain, page 15:


gwythïen

gwythïen m or f (plural gwythiennau or gwythienni)

gwythiennau (plural)
gwythienni (plural)
gwythïen (mutation mutation-radical)
wythïen (mutation mutation-soft)
ngwythïen (mutation mutation-nasal)

Singulative of gwythi (“veins”, archaic), plural of gŵyth (“vein”, archaic).


glyserig

cy-adj

glyserig (feminine singular glyserig, plural glyserig, not comparable)

glyserig (feminine singular)
glyserig (plural)

/ɡlɨ̞ˈsɛrɪɡ/

/ɡlɪˈseːrɪɡ/


uwchbridd

uwchbriddoedd (plural)
uwchbridd (mutation mutation-radical)
huwchbridd (mutation prothesis-h)

/ˈɨ̞u̯χbrɪð/

[ˈɨ̞u̯χbrɪð]


Athwenna

Athwenna (mutation mutation-radical)
Hathwenna (mutation prothesis-h)


Asaff

Asaff (mutation mutation-radical)
Hasaff (mutation prothesis-h)

a male given name, variant of Asa, equivalent to English Asaph


Arwyn

Arwyn (mutation mutation-radical)
Harwyn (mutation prothesis-h)

From ar- (intensifying prefix) + gwyn (“blessed”).

af

a male given name, feminine equivalent Arwen


alcalïaidd

cy-adj

alcalïaidd (feminine singular alcalïaidd, plural alcalïaidd, not comparable)

alcalïaidd (feminine singular)
alcalïaidd (plural)
alcalïaidd (mutation mutation-radical)
halcalïaidd (mutation prothesis-h)


metel alcalïaidd

cy-noun

metel alcalïaidd m (plural metelau alcalïaidd)

metelau alcalïaidd (plural)
metel alcalïaidd (mutation mutation-radical)
fetel alcalïaidd (mutation mutation-soft)


Aures

Aures (mutation mutation-radical)
Haures (mutation prothesis-h)


Aurddolen

Aurddolen (mutation mutation-radical)
Haurddolen (mutation prothesis-h)

/aɨ̯rˈðɔlɛn/


cochbryf

[ˈkʰɔχprɨ̞v]


rhewynt

rhewyntoedd (plural)
rhewynt (mutation mutation-radical)
rewynt (mutation mutation-soft)

From rhew (“ice, frost”) + gwynt (“wind”).

afalau rhewynt


mablygad

mablygaid (plural)
mablygad (mutation mutation-radical)
fablygad (mutation mutation-soft)


afal y llygad

afal y llygad m (plural afalau'r llygaid)

afalau'r llygaid (plural)
afal y llygad (mutation mutation-radical)
hafal y llygad (mutation prothesis-h)

Literally "apple of the eye". Likely a calque of English eye-apple or Old English ēagæppel.


drain wyneb

drain wyneb f (collective, singulative draenen wyneb)

draenen wyneb (singulative)
drain wyneb (mutation mutation-radical)
ddrain wyneb (mutation mutation-soft)
nrain wyneb (mutation mutation-nasal)


cylla

cylla m or f (plural cyllaon or cyllaoedd or cyllâu or cylleuau)

cyllaon (plural)
cyllaoedd (plural)
cyllâu (plural)
cylleuau (plural)


cwfen

coven (formal group or assembly of witches)

(figurative) coven (clique that shares common interests or activities)


cwfenfa

From cwfen + -fa, a calque of English covenstead.

(Wicca) covenstead (permanent circle or temple used to meet for rituals and to store religious items, often a mundane location)

(Wicca, metonymically) covenstead (Wiccan congregation)


cwfendir

From cwfen + dir, a calque of English covendom.

(Wicca) covendom (area served by a covenstead and inhabited by members of the coven)


di-dor

cy-adj

di-dor (feminine singular di-dor, plural di-dor, not comparable)

di-dor (feminine singular)
di-dor (plural)
di-dor (mutation mutation-radical)
ddi-dor (mutation mutation-soft)
ni-dor (mutation mutation-nasal)

From di- (“without, -less”) + tor (“cut, breakage”).


alsoddeg

alsoddeg (mutation mutation-radical)
halsoddeg (mutation prothesis-h)

(obsolete, mathematics) Synonym of algebra (“algebra”)


arwahanol

cy-adj

arwahanol (feminine singular arwahanol, plural arwahanol, equative mor arwahanol, comparative mwy arwahanol, superlative mwyaf arwahanol)

arwahanol (feminine singular)
arwahanol (plural)
mor arwahanol (equative)
mwy arwahanol (comparative)
mwyaf arwahanol (superlative)
arwahanol (mutation mutation-radical)
harwahanol (mutation prothesis-h)


Annibynnol

Annibynnol (feminine singular Annibynnol, plural Annibynnol, not comparable)

Annibynnol (feminine singular)
Annibynnol (plural)
Annibynnol (mutation mutation-radical)
Hannibynnol (mutation prothesis-h)


datgywasgu

cy-verb

datgywasgu (first-person singular present datgywasgaf)

datgywasgaf (first-person present singular)
datywasgaf (first-person future indicative present singular)
datywesgi (future indicative present second-person singular)
datywasga (future indicative present singular third-person)
datywasgwn (first-person future indicative plural present)
datywesgwch (future indicative plural present second-person)
datywasgwch (future indicative plural present second-person)
datywasgant (future indicative plural present third-person)
datywesgir (future impersonal indicative present)
datywasgwn (conditional first-person singular)
datywasgwn (first-person imperfect indicative singular subjunctive)
datywasgit (conditional second-person singular)
datywasgit (imperfect indicative second-person singular subjunctive)
datywasgai (conditional singular third-person)
datywasgai (imperfect indicative singular subjunctive third-person)
datywasgem (conditional first-person plural)
datywasgem (first-person imperfect indicative plural subjunctive)
datywasgech (conditional plural second-person)
datywasgech (imperfect indicative plural second-person subjunctive)
datywasgent (conditional plural third-person)
datywasgent (imperfect indicative plural subjunctive third-person)
datywesgid (conditional impersonal)
datywesgid (imperfect impersonal indicative subjunctive)
datywesgais (first-person preterite singular)
datywesgaist (preterite second-person singular)
datywasgodd (preterite singular third-person)
datywasgasom (first-person plural preterite)
datywasgasoch (plural preterite second-person)
datywasgasant (plural preterite third-person)
datywasgwyd (impersonal preterite)
datywasgaswn (first-person pluperfect singular)
datywasgasit (pluperfect second-person singular)
datywasgasai (pluperfect singular third-person)
datywasgasem (first-person pluperfect plural)
datywasgasech (pluperfect plural second-person)
datywasgasent (pluperfect plural third-person)
datywasgasid (impersonal pluperfect)
datywasgesid (impersonal pluperfect)
datywasgwyf (first-person present singular subjunctive)
datywesgych (present second-person singular subjunctive)
datywasgo (present singular subjunctive third-person)
datywasgom (first-person plural present subjunctive)
datywasgoch (plural present second-person subjunctive)
datywasgont (plural present subjunctive third-person)
datywasger (impersonal present subjunctive)
datywasga (imperative second-person singular)
datywasged (imperative singular third-person)
datywasgwn (first-person imperative plural)
datywesgwch (imperative plural second-person)
datywasgwch (imperative plural second-person)
datywasgent (imperative plural third-person)
datywasger (imperative impersonal)
datgywasgu (noun-from-verb)
datywasgedig (participle)
datywasgadwy (participle)
datywasga i (first-person future singular)
datywasgaf i (first-person future singular)
datywasgi di (future second-person singular)
datywasgith o (future singular third-person)
e (future singular third-person)
hi (future singular third-person)
datywasgiff e (future singular third-person)
datywasgwn ni (first-person future plural)
datywasgwch chi (future plural second-person)
datywasgan nhw (future plural third-person)
datywasgwn i (conditional first-person singular)
datywasgswn i (conditional first-person singular)
datywasget ti (conditional second-person singular)
datywasgset ti (conditional second-person singular)
datywasgai fo (conditional singular third-person)
fe (conditional singular third-person)
hi (conditional singular third-person)
datywasgsai fo (conditional singular third-person)
datywasgen ni (conditional first-person plural)
datywasgsen ni (conditional first-person plural)
datywasgech chi (conditional plural second-person)
datywasgsech chi (conditional plural second-person)
datywasgen nhw (conditional plural third-person)
datywasgsen nhw (conditional plural third-person)
datywasgais i (first-person preterite singular)
datywasges i (first-person preterite singular)
datywasgaist ti (preterite second-person singular)
datywasgest ti (preterite second-person singular)
datywasgodd o (preterite singular third-person)
e (preterite singular third-person)
hi (preterite singular third-person)
datywasgon ni (first-person plural preterite)
datywasgoch chi (plural preterite second-person)
datywasgon nhw (plural preterite third-person)
datywasga (imperative second-person singular)
datywasgwch (imperative plural second-person)
datgywasgu (mutation mutation-radical)
ddatgywasgu (mutation mutation-soft)
natgywasgu (mutation mutation-nasal)

From dat- (“de-”) + cywasgu (“to compress”).

(computing) to decompress (to restore compressed data)


is-arlywydd

is-arlywyddion (plural)
is-arlywydd (mutation mutation-radical)
his-arlywydd (mutation prothesis-h)

From is- (“sub-, vice-”) + arlywydd (“president”)


llifwaddod

llifwaddodion (plural)
llifwaddod (mutation mutation-radical)
lifwaddod (mutation mutation-soft)

From llif (“stream”) + gwaddod (“sediment”).


clustgap

clustgapiau (plural)
clustgap (mutation mutation-radical)
glustgap (mutation mutation-soft)
nghlustgap (mutation mutation-nasal)
chlustgap (mutation mutation-aspirate)


asymptotig

cy-adj

asymptotig (feminine singular asymptotig, plural asymptotig, not comparable)

asymptotig (feminine singular)
asymptotig (plural)

Borrowed from English asymptotic. By surface analysis, asymptot + -ig.

mathematical analysis
mathematical analysis


binomaidd

binomaidd (feminine singular binomaidd, plural binomaidd, not comparable)

binomaidd (feminine singular)
binomaidd (plural)


halwyn

Inherited from Middle Welsh halaen, cf. maharen (“ram”) from maharaen. Doublet of halen (“table salt”).


deintyddfa

cy-noun

deintyddfa f (plural deintyddfeydd or deintyddfâu)

deintyddfeydd (plural)
deintyddfâu (plural)
deintyddfa (mutation mutation-radical)
ddeintyddfa (mutation mutation-soft)
neintyddfa (mutation mutation-nasal)


buanedd

buanedd m (usually uncountable, plural buaneddau)

buaneddau (plural)
buanedd (mutation mutation-radical)
fuanedd (mutation mutation-soft)
muanedd (mutation mutation-nasal)


uned ariannol

uned ariannol f (plural unedau ariannol)

unedau ariannol (plural)
uned ariannol (mutation mutation-radical)
huned ariannol (mutation prothesis-h)


Cymdeithas yr Iaith

→ English: Cymdeithas

Welsh Language Society (a direct action pressure group founded in Wales in 1962)


Cronfa Ariannol Ryngwladol

Cronfa Ariannol Ryngwladol (mutation mutation-radical)
Gronfa Ariannol Ryngwladol (mutation mutation-soft)
Nghronfa Ariannol Ryngwladol (mutation mutation-nasal)
Chronfa Ariannol Ryngwladol (mutation mutation-aspirate)

International Monetary Fund
International Monetary Fund


cronfa ddŵr

cronfeydd dŵr (plural)
cronfa ddŵr (mutation mutation-radical)
gronfa ddŵr (mutation mutation-soft)
nghronfa ddŵr (mutation mutation-nasal)
chronfa ddŵr (mutation mutation-aspirate)

Weithiau mae angen draenio cronfeydd dŵr.

Sometimes reservoirs need to be drained.


mallter

mall (“pestilence, blight”) + -ter (“-ness”).


hawddfraint

cy-noun

hawddfraint f (plural hawddfreintiau, not mutable)

hawddfreintiau (plural)
hawddfraint (mutation mutation-radical)

From hawdd (“easy”) + braint (“privilege, right”).


cemegol

cemegol (mutation mutation-radical)
gemegol (mutation mutation-soft)
nghemegol (mutation mutation-nasal)
chemegol (mutation mutation-aspirate)

Adapted from English chemical. By surface analysis, cemeg (“chemistry”) + -ol.


ffenigl

Foeniculum vulgare
Foeniculum vulgare#Translingual


uwchganolbwynt

cy-noun

uwchganolbwynt m (plural uwchganolbwyntiau)

uwchganolbwyntiau (plural)
uwchganolbwynt (mutation mutation-radical)
huwchganolbwynt (mutation prothesis-h)

From uwch- (“epi-, super-”) + canolbwynt (“centrepoint”).


ontolegol

cy-adj

ontolegol (feminine singular ontolegol, plural ontolegol, not comparable)

ontolegol (feminine singular)
ontolegol (plural)
ontolegol (mutation mutation-radical)
hontolegol (mutation prothesis-h)

/ɔntɔˈlɛɡɔl/


isfeirniadaeth

isfeirniadaeth (mutation mutation-radical)
hisfeirniadaeth (mutation prothesis-h)

is- (“sub-”) + beirniadaeth (“criticism, adjucation”)

af

(theology, history) lower criticism, textual criticism


bodaeth

bodaeth (mutation mutation-radical)
fodaeth (mutation mutation-soft)
modaeth (mutation mutation-nasal)


hafaliad

cy-noun

hafaliad m (plural hafaliadau, not mutable)


integriad

integriadau (plural)
integriad (mutation mutation-radical)
hintegriad (mutation prothesis-h)


echelinol

cy-adj

echelinol (feminine singular echelinol, plural echelinol, equative mor echelinol, comparative mwy echelinol, superlative mwyaf echelinol)

echelinol (feminine singular)
echelinol (plural)
mor echelinol (equative)
mwy echelinol (comparative)
mwyaf echelinol (superlative)
echelinol (mutation mutation-radical)
hechelinol (mutation prothesis-h)


bodegol

bodegol (feminine singular bodegol, plural bodegol, not comparable)

bodegol (feminine singular)
bodegol (plural)
bodegol (mutation mutation-radical)
fodegol (mutation mutation-soft)
modegol (mutation mutation-nasal)


ysfa

cy-noun

ysfa f (plural ysfeydd or ysfaoedd or ysfeuon)

ysfeydd (plural)
ysfaoedd (plural)
ysfeuon (plural)
ysfa (mutation mutation-radical)
hysfa (mutation prothesis-h)

Alternative form of rhosfa (“sheep-walk”)


atchweliad

(biology, genetics, psychology, statistics) regression


ontoleg

ontoleg (mutation mutation-radical)
hontoleg (mutation prothesis-h)


ymhelaethiad

From ymhelaethu (“to enlarge oneself”) + -iad.

af

(mathematics) self-enlargement, amplification, elaboration


integrol

cy-adj

integrol (feminine singular integrol, plural integrol, not comparable)

integrol (feminine singular)
integrol (plural)


ardrawiad

From ardaro (“to affect”) + -iad or ar- + trawiad (“strike, blow”).


apig

apigau (plural)
apig (mutation mutation-radical)
hapig (mutation prothesis-h)


morddwyd

morddwydydd (plural)
morddwyd (mutation mutation-radical)
forddwyd (mutation mutation-soft)


apigol

apigol (feminine singular apigol, plural apigol, not comparable)

apigol (feminine singular)
apigol (plural)
apigol (mutation mutation-radical)
hapigol (mutation prothesis-h)

Adapted from English apical. By surface analysis, apig (“apex”) + -ol, although apig is in fact a backformation from this term.


pen-glin

pen-gliniau (plural)
pen-glin (mutation mutation-radical)
ben-glin (mutation mutation-soft)
mhen-glin (mutation mutation-nasal)
phen-glin (mutation mutation-aspirate)


amrediad

range, span, scope
(mathematics, statistics) range


cesail y forddwyd

cy-noun

cesail y forddwyd f (plural ceseiliau y morddwydydd)

ceseiliau y morddwydydd (plural)
cesail y forddwyd (mutation mutation-radical)
gesail y forddwyd (mutation mutation-soft)
nghesail y forddwyd (mutation mutation-nasal)
chesail y forddwyd (mutation mutation-aspirate)

(anatomy) Alternative form of cesail morddwyd (“groin”)


cesail morddwyd

cesail morddwyd f (plural ceseiliau morddwydydd)

ceseiliau morddwydydd (plural)
cesail morddwyd (mutation mutation-radical)
gesail morddwyd (mutation mutation-soft)
nghesail morddwyd (mutation mutation-nasal)
chesail morddwyd (mutation mutation-aspirate)


gwäell y fraich

gwäell y fraich f (plural gwëyll y breich)

gwëyll y breich (plural)
gwäell y fraich (mutation mutation-radical)
wäell y fraich (mutation mutation-soft)
ngwäell y fraich (mutation mutation-nasal)

(anatomy) radius (long bone in the forearm)


ffrydlif

ffrydlif m (plural ffrydlifau, not mutable)


uwchfeirniadaeth

uwchfeirniadaeth (mutation mutation-radical)
huwchfeirniadaeth (mutation prothesis-h)

uwch- (“hyper-, super-”) + beirniadaeth (“criticism, adjucation”)

af

historical criticism
historical criticism

(theology, history) higher criticism, historical criticism


nodiant degol

cy-noun

nodiant degol m (uncountable, not mutable)


lle degol

lle degol m (plural lleoedd degol or lleoedd degolion)

lleoedd degol (plural)
lleoedd degolion (plural)


pwynt degymol

pwynt degymol m (plural pwyntiau degymol or pwyntiau degymolion)

pwyntiau degymol (plural)
pwyntiau degymolion (plural)


pwynt degol

pwynt degol m (plural pwyntiau degol or pwyntiau degolion)

pwyntiau degol (plural)
pwyntiau degolion (plural)


rhif degol

rhif degol m (plural rhifau degol or rhifau degolion)

rhifau degol (plural)
rhifau degolion (plural)


graffigol

cy-adj

graffigol (feminine singular graffigol, plural graffigol, not comparable)

graffigol (feminine singular)
graffigol (plural)
graffigol (mutation mutation-radical)
raffigol (mutation mutation-soft)
ngraffigol (mutation mutation-nasal)

Adapted from English graphical. By surface analysis, graffig (“graphic”) + -ol.


echreiddiad

echreiddiadau (plural)
echreiddiad (mutation mutation-radical)
hechreiddiad (mutation prothesis-h)

From ech- (“ex-”) + craidd (“centre, middle”) + -iad.


sgalar

cy-adj

sgalar (feminine singular sgalar, plural sgalar, not comparable, not mutable)

singular sgalar (feminine)
sgalar (plural)


sgalar

(mathematics, physics) a scalar (a quantity that has magnitude but no specified direction)


fector

fector (feminine singular fector, plural fector, not comparable, not mutable)

fector (feminine singular)
fector (plural)


fector

(mathematics, physics) a vector (a quantity that has both magnitude and direction)

(biology, medicine) a vector (a means of transmission)


echreiddig

echreiddig (feminine singular echreiddig, plural echreiddig, equative mor echreiddig, comparative mwy echreiddig, superlative mwyaf echreiddig)

echreiddig (feminine singular)
echreiddig (plural)
mor echreiddig (equative)
mwy echreiddig (comparative)
mwyaf echreiddig (superlative)

From ech- (“ex-”) + craidd (“centre, middle”) + -ig.


echreiddig

echreiddigau (plural)
echreiddig (mutation mutation-radical)
hechreiddig (mutation prothesis-h)


llinellydd

llinellyddion (plural)
llinellydd (mutation mutation-radical)
linellydd (mutation mutation-soft)


allanoliad

allanoliadau (plural)
allanoliad (mutation mutation-radical)
hallanoliad (mutation prothesis-h)


tafluniad

tafluniadau (plural)
tafluniad (mutation mutation-radical)
dafluniad (mutation mutation-soft)
nhafluniad (mutation mutation-nasal)
thafluniad (mutation mutation-aspirate)


porthmon

cy-noun

porthmon m (plural porthmyn, feminine porthmones)

porthmyn (plural)
porthmones (feminine)
porthmon (mutation mutation-radical)
borthmon (mutation mutation-soft)
mhorthmon (mutation mutation-nasal)
phorthmon (mutation mutation-aspirate)

Adapted from English portman. By surface analysis, porth + -mon.


cosb eithaf

y gosb eithaf (canonical feminine)
cosb eithaf (mutation mutation-radical)
gosb eithaf (mutation mutation-soft)
nghosb eithaf (mutation mutation-nasal)
chosb eithaf (mutation mutation-aspirate)


cosb farwolaeth

cosb farwolaeth f (plural cosbau marwolaeth)

cosbau marwolaeth (plural)
cosb farwolaeth (mutation mutation-radical)
gosb farwolaeth (mutation mutation-soft)
nghosb farwolaeth (mutation mutation-nasal)
chosb farwolaeth (mutation mutation-aspirate)


isradd

israddau (plural)
isradd (mutation mutation-radical)
hisradd (mutation prothesis-h)


fectoru

cy-verb

fectoru (first-person singular present fectoraf, not mutable)

fectoraf (first-person present singular)
fectoraf (first-person future indicative present singular)
fectori (future indicative present second-person singular)
fectora (future indicative present singular third-person)
fectorwn (first-person future indicative plural present)
fectorwch (future indicative plural present second-person)
fectorant (future indicative plural present third-person)
fectorir (future impersonal indicative present)
fectorwn (conditional first-person singular)
fectorwn (first-person imperfect indicative singular subjunctive)
fectorit (conditional second-person singular)
fectorit (imperfect indicative second-person singular subjunctive)
fectorai (conditional singular third-person)
fectorai (imperfect indicative singular subjunctive third-person)
fectorem (conditional first-person plural)
fectorem (first-person imperfect indicative plural subjunctive)
fectorech (conditional plural second-person)
fectorech (imperfect indicative plural second-person subjunctive)
fectorent (conditional plural third-person)
fectorent (imperfect indicative plural subjunctive third-person)
fectorid (conditional impersonal)
fectorid (imperfect impersonal indicative subjunctive)
fectorais (first-person preterite singular)
fectoraist (preterite second-person singular)
fectorodd (preterite singular third-person)
fectorasom (first-person plural preterite)
fectorasoch (plural preterite second-person)
fectorasant (plural preterite third-person)
fectorwyd (impersonal preterite)
fectoraswn (first-person pluperfect singular)
fectorasit (pluperfect second-person singular)
fectorasai (pluperfect singular third-person)
fectorasem (first-person pluperfect plural)
fectorasech (pluperfect plural second-person)
fectorasent (pluperfect plural third-person)
fectorasid (impersonal pluperfect)
fectoresid (impersonal pluperfect)
fectorwyf (first-person present singular subjunctive)
fectorych (present second-person singular subjunctive)
fectoro (present singular subjunctive third-person)
fectorom (first-person plural present subjunctive)
fectoroch (plural present second-person subjunctive)
fectoront (plural present subjunctive third-person)
fectorer (impersonal present subjunctive)
fectored (imperative singular third-person)
fectorwn (first-person imperative plural)
fectorwch (imperative plural second-person)
fectorent (imperative plural third-person)
fectorer (imperative impersonal)
fectoru (noun-from-verb)
fectoredig (participle)
fectora i (first-person future singular)
fectoraf i (first-person future singular)
fectori di (future second-person singular)
fectorith o (future singular third-person)
e (future singular third-person)
hi (future singular third-person)
fectoriff e (future singular third-person)
fectorwn ni (first-person future plural)
fectorwch chi (future plural second-person)
fectoran nhw (future plural third-person)
fectorwn i (conditional first-person singular)
fectorswn i (conditional first-person singular)
fectoret ti (conditional second-person singular)
fectorset ti (conditional second-person singular)
fectorai fo (conditional singular third-person)
fe (conditional singular third-person)
hi (conditional singular third-person)
fectorsai fo (conditional singular third-person)
fectoren ni (conditional first-person plural)
fectorsen ni (conditional first-person plural)
fectorech chi (conditional plural second-person)
fectorsech chi (conditional plural second-person)
fectoren nhw (conditional plural third-person)
fectorsen nhw (conditional plural third-person)
fectorais i (first-person preterite singular)
fectores i (first-person preterite singular)
fectoraist ti (preterite second-person singular)
fectorest ti (preterite second-person singular)
fectorodd o (preterite singular third-person)
e (preterite singular third-person)
hi (preterite singular third-person)
fectoron ni (first-person plural preterite)
fectoroch chi (plural preterite second-person)
fectoron nhw (plural preterite third-person)
fectora (imperative second-person singular)
fectorwch (imperative plural second-person)
fectoru (mutation mutation-radical)


darllenydd

cy-noun

darllenydd m (plural darllenyddion, feminine darllenyddes)

darllenyddion (plural)
darllenyddes (feminine)
darllenydd (mutation mutation-radical)
ddarllenydd (mutation mutation-soft)
narllenydd (mutation mutation-nasal)


aliffatig

cy-adj

aliffatig (feminine singular aliffatig, plural aliffatig, not comparable)

aliffatig (feminine singular)
aliffatig (plural)
aliffatig (mutation mutation-radical)
haliffatig (mutation prothesis-h)


atmosffer

atmosfferau (plural)
atmosffer (mutation mutation-radical)
hatmosffer (mutation prothesis-h)


aligylchol

aligylchol (feminine singular aligylchol, plural aligylchol, not comparable)

aligylchol (feminine singular)
aligylchol (plural)
aligylchol (mutation mutation-radical)
haligylchol (mutation prothesis-h)

Blend of aliffatig (“aliphatic”) + cylchol (“cyclic”). Calque of English alicyclic.


cwadratig

cy-adj

cwadratig (feminine singular cwadratig, plural cwadratig, not comparable)

cwadratig (feminine singular)
cwadratig (plural)
cwadratig (mutation mutation-radical)
gwadratig (mutation mutation-soft)
nghwadratig (mutation mutation-nasal)
chwadratig (mutation mutation-aspirate)


amledd

amleddau (plural)
amledd (mutation mutation-radical)
hamledd (mutation prothesis-h)


actifedd

actifeddau (plural)
actifedd (mutation mutation-radical)
hactifedd (mutation prothesis-h)


gwireb

gwirebau (plural)
gwirebion (plural)
gwireb (mutation mutation-radical)
wireb (mutation mutation-soft)
ngwireb (mutation mutation-nasal)


acsiom

acsiomau (plural)
acsiom (mutation mutation-radical)
hacsiom (mutation prothesis-h)


ceugrwm

ceugrwm (feminine singular ceugrom, plural ceugrwm, not comparable)

ceugrom (feminine singular)
ceugrwm (plural)
ceugrwm (mutation mutation-radical)
geugrwm (mutation mutation-soft)
ngheugrwm (mutation mutation-nasal)
cheugrwm (mutation mutation-aspirate)


affinedd

affineddau (plural)
affinedd (mutation mutation-radical)
haffinedd (mutation prothesis-h)


amgrwm

amgrwm (feminine singular amgrom, plural amgrwm, not comparable)

amgrom (feminine singular)
amgrwm (plural)
amgrwm (mutation mutation-radical)
hamgrwm (mutation prothesis-h)

From am- (“around, circum-”) + crwm (“crooked”).


ymbelydrol

cy-adj

ymbelydrol (feminine singular ymbelydrol, plural ymbelydrol, equative mor ymbelydrol, comparative mwy ymbelydrol, superlative mwyaf ymbelydrol)

ymbelydrol (feminine singular)
ymbelydrol (plural)
mor ymbelydrol (equative)
mwy ymbelydrol (comparative)
mwyaf ymbelydrol (superlative)
ymbelydrol (mutation mutation-radical)
hymbelydrol (mutation prothesis-h)


aflem

aflem (feminine singular aflem, plural aflem, not comparable)

aflem (feminine singular)
aflem (plural)
aflem (mutation mutation-radical)
haflem (mutation prothesis-h)


pobydd

cy-noun

pobydd m (plural pobyddion, feminine pobyddes)

pobyddion (plural)
pobyddes (feminine)
pobydd (mutation mutation-radical)
bobydd (mutation mutation-soft)
mhobydd (mutation mutation-nasal)
phobydd (mutation mutation-aspirate)


materolaidd

cy-adj

materolaidd (feminine singular materolaidd, plural materolaidd, equative mor faterolaidd, comparative mwy materolaidd, superlative mwyaf materolaidd)

materolaidd (feminine singular)
materolaidd (plural)
mor faterolaidd (equative)
mwy materolaidd (comparative)
mwyaf materolaidd (superlative)
materolaidd (mutation mutation-radical)
faterolaidd (mutation mutation-soft)

(philosophy) materialistic, pertaining to materialism


gwrthfater

gwrthfater (mutation mutation-radical)
wrthfater (mutation mutation-soft)
ngwrthfater (mutation mutation-nasal)


gwrthfaterol

gwrthfaterol (feminine singular gwrthfaterol, plural gwrthfaterol, not comparable)

gwrthfaterol (feminine singular)
gwrthfaterol (plural)
gwrthfaterol (mutation mutation-radical)
wrthfaterol (mutation mutation-soft)
ngwrthfaterol (mutation mutation-nasal)


materyddol

materyddol (feminine singular materyddol, plural materyddol, equative mor fateryddol, comparative mwy materyddol, superlative mwyaf materyddol)

materyddol (feminine singular)
materyddol (plural)
mor fateryddol (equative)
mwy materyddol (comparative)
mwyaf materyddol (superlative)
materyddol (mutation mutation-radical)
fateryddol (mutation mutation-soft)

materydd (“philosophical materialist”) + -ol.


materydd

materyddion (plural)
materydd (mutation mutation-radical)
faterydd (mutation mutation-soft)


materolwr

materolwyr (plural)
materolwr (mutation mutation-radical)
faterolwr (mutation mutation-soft)


anghyfochrog

cy-adj

anghyfochrog (feminine singular anghyfochrog, plural anghyfochrog, not comparable)

anghyfochrog (feminine singular)
anghyfochrog (plural)
anghyfochrog (mutation mutation-radical)
hanghyfochrog (mutation prothesis-h)

From an- (“un-”) + cyfochrog (“parallel”).


materiaethol

materiaethol (feminine singular materiaethol, plural materiaethol, equative mor fateriaethol, comparative mwy materiaethol, superlative mwyaf materiaethol)

materiaethol (feminine singular)
materiaethol (plural)
mor fateriaethol (equative)
mwy materiaethol (comparative)
mwyaf materiaethol (superlative)
materiaethol (mutation mutation-radical)
fateriaethol (mutation mutation-soft)


ffocws cinetig

cy-noun

ffocws cinetig m (plural ffocysau cinetig, not mutable)

ffocysau cinetig (plural)
ffocws cinetig (mutation mutation-radical)


egni cinetig

egni cinetig (mutation mutation-radical)
hegni cinetig (mutation prothesis-h)


cyfochrog

cy-adj

cyfochrog (feminine singular cyfochrog, plural cyfochrog, not comparable)

cyfochrog (feminine singular)
cyfochrog (plural)
cyfochrog (mutation mutation-radical)
gyfochrog (mutation mutation-soft)
nghyfochrog (mutation mutation-nasal)
chyfochrog (mutation mutation-aspirate)

From cy- (“co-”) + ochrog (“sided, having sides”).


ecsentrig

cy-adj

ecsentrig (feminine singular ecsentrig, plural ecsentrig, equative mor ecsentrig, comparative mwy ecsentrig, superlative mwyaf ecsentrig)

ecsentrig (feminine singular)
ecsentrig (plural)
mor ecsentrig (equative)
mwy ecsentrig (comparative)
mwyaf ecsentrig (superlative)
ecsentrig (mutation mutation-radical)
hecsentrig (mutation prothesis-h)


Ewclidaidd

Ewclidaidd (feminine singular Ewclidaidd, plural Ewclidaidd, not comparable)

Ewclidaidd (feminine singular)
Ewclidaidd (plural)
Ewclidaidd (mutation mutation-radical)
Hewclidaidd (mutation prothesis-h)


fector safle

cy-noun

fector safle m (plural fector safleau, not mutable)


cinetig

cy-adj

cinetig (feminine singular cinetig, plural cinetig, not comparable)

cinetig (feminine singular)
cinetig (plural)
cinetig (mutation mutation-radical)
ginetig (mutation mutation-soft)
nghinetig (mutation mutation-nasal)
chinetig (mutation mutation-aspirate)


enrhifo

cy-verb

enrhifo (first-person singular present enrhifaf)

enrhifaf (first-person present singular)
enrhifaf (first-person future indicative present singular)
enrhifi (future indicative present second-person singular)
enrhif (future indicative present singular third-person)
enrhifa (future indicative present singular third-person)
enrhifwn (first-person future indicative plural present)
enrhifwch (future indicative plural present second-person)
enrhifant (future indicative plural present third-person)
enrhifir (future impersonal indicative present)
enrhifwn (conditional first-person singular)
enrhifwn (first-person imperfect indicative singular subjunctive)
enrhifit (conditional second-person singular)
enrhifit (imperfect indicative second-person singular subjunctive)
enrhifai (conditional singular third-person)
enrhifai (imperfect indicative singular subjunctive third-person)
enrhifem (conditional first-person plural)
enrhifem (first-person imperfect indicative plural subjunctive)
enrhifech (conditional plural second-person)
enrhifech (imperfect indicative plural second-person subjunctive)
enrhifent (conditional plural third-person)
enrhifent (imperfect indicative plural subjunctive third-person)
enrhifid (conditional impersonal)
enrhifid (imperfect impersonal indicative subjunctive)
enrhifais (first-person preterite singular)
enrhifaist (preterite second-person singular)
enrhifodd (preterite singular third-person)
enrhifasom (first-person plural preterite)
enrhifasoch (plural preterite second-person)
enrhifasant (plural preterite third-person)
enrhifwyd (impersonal preterite)
enrhifaswn (first-person pluperfect singular)
enrhifasit (pluperfect second-person singular)
enrhifasai (pluperfect singular third-person)
enrhifasem (first-person pluperfect plural)
enrhifasech (pluperfect plural second-person)
enrhifasent (pluperfect plural third-person)
enrhifasid (impersonal pluperfect)
enrhifesid (impersonal pluperfect)
enrhifwyf (first-person present singular subjunctive)
enrhifych (present second-person singular subjunctive)
enrhifo (present singular subjunctive third-person)
enrhifom (first-person plural present subjunctive)
enrhifoch (plural present second-person subjunctive)
enrhifont (plural present subjunctive third-person)
enrhifer (impersonal present subjunctive)
enrhif (imperative second-person singular)
enrhifa (imperative second-person singular)
enrhifed (imperative singular third-person)
enrhifwn (first-person imperative plural)
enrhifwch (imperative plural second-person)
enrhifent (imperative plural third-person)
enrhifer (imperative impersonal)
enrhifo (noun-from-verb)
enrhifedig (participle)
enrhifadwy (participle)
enrhifa i (first-person future singular)
enrhifaf i (first-person future singular)
enrhifi di (future second-person singular)
enrhifith o (future singular third-person)
e (future singular third-person)
hi (future singular third-person)
enrhififf e (future singular third-person)
enrhifwn ni (first-person future plural)
enrhifwch chi (future plural second-person)
enrhifan nhw (future plural third-person)
enrhifwn i (conditional first-person singular)
enrhifswn i (conditional first-person singular)
enrhifet ti (conditional second-person singular)
enrhifset ti (conditional second-person singular)
enrhifai fo (conditional singular third-person)
fe (conditional singular third-person)
hi (conditional singular third-person)
enrhifsai fo (conditional singular third-person)
enrhifen ni (conditional first-person plural)
enrhifsen ni (conditional first-person plural)
enrhifech chi (conditional plural second-person)
enrhifsech chi (conditional plural second-person)
enrhifen nhw (conditional plural third-person)
enrhifsen nhw (conditional plural third-person)
enrhifais i (first-person preterite singular)
enrhifes i (first-person preterite singular)
enrhifaist ti (preterite second-person singular)
enrhifest ti (preterite second-person singular)
enrhifodd o (preterite singular third-person)
e (preterite singular third-person)
hi (preterite singular third-person)
enrhifon ni (first-person plural preterite)
enrhifoch chi (plural preterite second-person)
enrhifon nhw (plural preterite third-person)
enrhifa (imperative second-person singular)
enrhifwch (imperative plural second-person)
enrhifo (mutation mutation-radical)
henrhifo (mutation prothesis-h)

enrhif (“mathematical value”) + -o or en- + rhifo (“to count”).


pum ugain

(cardinal number, obsolete, vigesimal) Alternative form of pumhugain (“five score”)


card chwarae

cy-noun

card chwarae m (plural cardiau chawarae)

cardiau chawarae (plural)
card chwarae (mutation mutation-radical)
gard chwarae (mutation mutation-soft)
nghard chwarae (mutation mutation-nasal)
chard chwarae (mutation mutation-aspirate)


hwsmon

hwsmon m (plural hwsmyn or hwsmoniaid, not mutable)

hwsmyn (plural)
hwsmoniaid (plural)
hwsmon (mutation mutation-radical)


amaeth

amaeth m (plural amaethiaid or amaethion or amaethod or emaith or emyth)

amaethiaid (plural)
amaethion (plural)
amaethod (plural)
emaith (plural)
emyth (plural)
amaeth (mutation mutation-radical)
hamaeth (mutation prothesis-h)

Inherited from Middle Welsh amaeth, from Proto-Brythonic *ammaɨθ (“labourer”), from Proto-Celtic *ambaxtos (“servant”).

(obsolete, uncountable) tillage, ploughing


amaethwr

amaethwr m or f by sense (plural amaethwyr)

amaethwyr (plural)
amaethwr (mutation mutation-radical)
hamaethwr (mutation prothesis-h)


pumhugain

(cardinal number, obsolete, vigesimal) one hundred, five score


lladd-dy

lladd-dai (plural)
lladd-dy (mutation mutation-radical)
ladd-dy (mutation mutation-soft)

From lladd (“kill, slaughter”) + tŷ (“house”).


heol ddwbl

cy-noun

heol ddwbl f (plural heolydd dwbl, not mutable)


croesfan sebra

croesfan sebra m or f (plural croesfannau sebra)


croesfan gwastad

croesfan gwastad m (plural croesfannau gwastad)


heol ddeuol

heol ddeuol f (plural heolydd deuol, not mutable)

Bydd gwaith cyfredol tebyg i ddolen rheilffordd Abertyleri a gwneud Ffordd Blaenau’r Cymoedd yn heol ddeuol i gyd yn helpu i wella cysylltedd ar gyfer ymwelwyr.

2021 September 22, Blaenau Gwent: Newyddion:

Current work such as the Abertillery railway link and making the Blaenau'r Cymoedd Road a dual carriageway will all help to improve connectivity for visitors.

A hithau'n ŵyl y banc, mae'r heol ddeuol yn arfer bod yn orlawn…

Being a bank holiday, the dual carriageway is usually packed…


ffordd ddeuol

ffordd ddeuol f (plural ffyrdd deuol, not mutable)

O'dd hi'n anhygoel i weld y ffordd ddeuol mor wag…

It was amazing to see the dual carriageway so empty…