tarthu

tarthu (first-person singular present tarthaf)

tarthaf (first-person present singular)
tarthaf (first-person future indicative present singular)
sychderthi (future indicative present second-person singular)
tartha (future indicative present singular third-person)
tarthwn (first-person future indicative plural present)
sychderthwch (future indicative plural present second-person)
tarthwch (future indicative plural present second-person)
tarthant (future indicative plural present third-person)
sychderthir (future impersonal indicative present)
tarthwn (conditional first-person singular)
tarthwn (first-person imperfect indicative singular subjunctive)
tarthit (conditional second-person singular)
tarthit (imperfect indicative second-person singular subjunctive)
tarthai (conditional singular third-person)
tarthai (imperfect indicative singular subjunctive third-person)
tarthem (conditional first-person plural)
tarthem (first-person imperfect indicative plural subjunctive)
tarthech (conditional plural second-person)
tarthech (imperfect indicative plural second-person subjunctive)
tarthent (conditional plural third-person)
tarthent (imperfect indicative plural subjunctive third-person)
sychderthid (conditional impersonal)
sychderthid (imperfect impersonal indicative subjunctive)
sychderthais (first-person preterite singular)
sychderthaist (preterite second-person singular)
tarthodd (preterite singular third-person)
tarthasom (first-person plural preterite)
tarthasoch (plural preterite second-person)
tarthasant (plural preterite third-person)
tarthwyd (impersonal preterite)
tarthaswn (first-person pluperfect singular)
tarthasit (pluperfect second-person singular)
tarthasai (pluperfect singular third-person)
tarthasem (first-person pluperfect plural)
tarthasech (pluperfect plural second-person)
tarthasent (pluperfect plural third-person)
tarthasid (impersonal pluperfect)
tarthesid (impersonal pluperfect)
tarthwyf (first-person present singular subjunctive)
sychderthych (present second-person singular subjunctive)
tartho (present singular subjunctive third-person)
tarthom (first-person plural present subjunctive)
tarthoch (plural present second-person subjunctive)
tarthont (plural present subjunctive third-person)
tarther (impersonal present subjunctive)
tartha (imperative second-person singular)
tarthed (imperative singular third-person)
tarthwn (first-person imperative plural)
sychderthwch (imperative plural second-person)
tarthwch (imperative plural second-person)
tarthent (imperative plural third-person)
tarther (imperative impersonal)
tarthu (noun-from-verb singular)
tarthedig (participle singular)
tarthadwy (participle singular)
tartha i (first-person future singular)
tarthaf i (first-person future singular)
tarthi di (future second-person singular)
tarthith o (future singular third-person)
e (future singular third-person)
hi (future singular third-person)
tarthiff e (future singular third-person)
tarthwn ni (first-person future plural)
tarthwch chi (future plural second-person)
tarthan nhw (future plural third-person)
tarthwn i (conditional first-person singular)
tarthswn i (conditional first-person singular)
tarthet ti (conditional second-person singular)
tarthset ti (conditional second-person singular)
tarthai fo (conditional singular third-person)
fe (conditional singular third-person)
hi (conditional singular third-person)
tarthsai fo (conditional singular third-person)
tarthen ni (conditional first-person plural)
tarthsen ni (conditional first-person plural)
tarthech chi (conditional plural second-person)
tarthsech chi (conditional plural second-person)
tarthen nhw (conditional plural third-person)
tarthsen nhw (conditional plural third-person)
tarthais i (first-person preterite singular)
tarthes i (first-person preterite singular)
tarthaist ti (preterite second-person singular)
tarthest ti (preterite second-person singular)
tarthodd o (preterite singular third-person)
e (preterite singular third-person)
hi (preterite singular third-person)
tarthon ni (first-person plural preterite)
tarthoch chi (plural preterite second-person)
tarthon nhw (plural preterite third-person)
tartha (imperative second-person singular)
tarthwch (imperative plural second-person)


gwaddod

From Proto-Celtic *wodātu. Synchrynically analysable as a deverbalisation of gwaddodi (“to precipitate”).


chwiliwr

cy-noun

chwiliwr m (plural chwilwyr, not mutable)


chwiliwr Hall

chwiliwr Hall m (plural chwilwyr Hall, not mutable)

chwiliwr (“probe”) + named after American physicist Edwin Herbert Hall (1855–1938).


chwiliedydd

cy-noun

chwiliedydd m (plural chwiliedyddion, not mutable)

/χwɪlˈjɛdɨ̞ð/

/χwɪlˈjɛdɪð/


chwiliedydd Hall

chwiliedydd Hall m (plural chwiliedyddion Hall, not mutable)

chwiliedydd (“probe”) + named after American physicist Edwin Herbert Hall (1855–1938).


chwiliedydd fflam

chwiliedydd fflam m (plural chwiliedyddion fflam, not mutable)


gwaddodiad

gwaddodiadau (plural)
gwaddodiad
waddodiad (soft)
ngwaddodiad

From gwaddodi (“to precipitate”) + -iad.


gwaddodi

cy-verb

gwaddodi (first-person singular present gwaddodaf)

gwaddodaf (first-person present singular)
gwaddodaf (first-person future indicative present singular)
gwaddodi (future indicative present second-person singular)
gwaddoda (future indicative present singular third-person)
gwaddodwn (first-person future indicative plural present)
gwaddodwch (future indicative plural present second-person)
gwaddodant (future indicative plural present third-person)
gwaddodir (future impersonal indicative present)
gwaddodwn (conditional first-person singular)
gwaddodwn (first-person imperfect indicative singular subjunctive)
gwaddodit (conditional second-person singular)
gwaddodit (imperfect indicative second-person singular subjunctive)
gwaddodai (conditional singular third-person)
gwaddodai (imperfect indicative singular subjunctive third-person)
gwaddodem (conditional first-person plural)
gwaddodem (first-person imperfect indicative plural subjunctive)
gwaddodech (conditional plural second-person)
gwaddodech (imperfect indicative plural second-person subjunctive)
gwaddodent (conditional plural third-person)
gwaddodent (imperfect indicative plural subjunctive third-person)
gwaddodid (conditional impersonal)
gwaddodid (imperfect impersonal indicative subjunctive)
gwaddodais (first-person preterite singular)
gwaddodaist (preterite second-person singular)
gwaddododd (preterite singular third-person)
gwaddodasom (first-person plural preterite)
gwaddodasoch (plural preterite second-person)
gwaddodasant (plural preterite third-person)
gwaddodwyd (impersonal preterite)
gwaddodaswn (first-person pluperfect singular)
gwaddodasit (pluperfect second-person singular)
gwaddodasai (pluperfect singular third-person)
gwaddodasem (first-person pluperfect plural)
gwaddodasech (pluperfect plural second-person)
gwaddodasent (pluperfect plural third-person)
gwaddodasid (impersonal pluperfect)
gwaddodesid (impersonal pluperfect)
gwaddodwyf (first-person present singular subjunctive)
gwaddodych (present second-person singular subjunctive)
gwaddodo (present singular subjunctive third-person)
gwaddodom (first-person plural present subjunctive)
gwaddodoch (plural present second-person subjunctive)
gwaddodont (plural present subjunctive third-person)
gwaddoder (impersonal present subjunctive)
gwaddoda (imperative second-person singular)
gwaddoded (imperative singular third-person)
gwaddodwn (first-person imperative plural)
gwaddodwch (imperative plural second-person)
gwaddodent (imperative plural third-person)
gwaddoder (imperative impersonal)
gwaddodi (noun-from-verb singular)
gwaddodedig (participle singular)
gwaddodadwy (participle singular)
gwaddoda i (first-person future singular)
gwaddodaf i (first-person future singular)
gwaddodi di (future second-person singular)
gwaddodith o (future singular third-person)
e (future singular third-person)
hi (future singular third-person)
gwaddodiff e (future singular third-person)
gwaddodwn ni (first-person future plural)
gwaddodwch chi (future plural second-person)
gwaddodan nhw (future plural third-person)
gwaddodwn i (conditional first-person singular)
gwaddodswn i (conditional first-person singular)
gwaddodet ti (conditional second-person singular)
gwaddodset ti (conditional second-person singular)
gwaddodai fo (conditional singular third-person)
fe (conditional singular third-person)
hi (conditional singular third-person)
gwaddodsai fo (conditional singular third-person)
gwaddoden ni (conditional first-person plural)
gwaddodsen ni (conditional first-person plural)
gwaddodech chi (conditional plural second-person)
gwaddodsech chi (conditional plural second-person)
gwaddoden nhw (conditional plural third-person)
gwaddodsen nhw (conditional plural third-person)
gwaddodais i (first-person preterite singular)
gwaddodes i (first-person preterite singular)
gwaddodaist ti (preterite second-person singular)
gwaddodest ti (preterite second-person singular)
gwaddododd o (preterite singular third-person)
e (preterite singular third-person)
hi (preterite singular third-person)
gwaddodon ni (first-person plural preterite)
gwaddodoch chi (plural preterite second-person)
gwaddodon nhw (plural preterite third-person)
gwaddoda (imperative second-person singular)
gwaddodwch (imperative plural second-person)
gwaddodi
waddodi (soft)
ngwaddodi

From gwa- (“under, sub-”) + dodi (“to put, to place”).

af

(chemistry, geography) to deposit sediment, to precipitate


bysbrint

bysbrintiau (plural)
bysbrint
fysbrint (soft)
mysbrint


sylffad

cy-noun

sylffad m (plural sylffadau, not mutable)

Borrowed from English sulfate or sulphate. By surface analysis, sylff- (“sulf-”) + -ad (“-ate”).


clorid

Borrowed from English chloride, analysable as clor- (“chlor(o)-”) + -id (“ide”).


fflworid

cy-noun

fflworid m (plural fflworidau, not mutable)

Borrowed from English fluoride, analysable as fflwor- (“fluor(o)-”) + -id (“ide”).


clor-

(organic chemistry) Alternative form of cloro- (“containing chlorine”), used before a vowel


fflworo-

(organic chemistry) fluoro- (containing fluorine)


fflwor-

(organic chemistry) Alternative form of fflworo- (“containing fluorine”), used before a vowel


nitradu

cy-verb

nitradu (first-person singular present nitradaf, not mutable)

nitradaf (first-person present singular)
nitradaf (first-person future indicative present singular)
nitredi (future indicative present second-person singular)
nitrada (future indicative present singular third-person)
nitradwn (first-person future indicative plural present)
nitredwch (future indicative plural present second-person)
nitradwch (future indicative plural present second-person)
nitradant (future indicative plural present third-person)
nitredir (future impersonal indicative present)
nitradwn (conditional first-person singular)
nitradwn (first-person imperfect indicative singular subjunctive)
nitradit (conditional second-person singular)
nitradit (imperfect indicative second-person singular subjunctive)
nitradai (conditional singular third-person)
nitradai (imperfect indicative singular subjunctive third-person)
nitradem (conditional first-person plural)
nitradem (first-person imperfect indicative plural subjunctive)
nitradech (conditional plural second-person)
nitradech (imperfect indicative plural second-person subjunctive)
nitradent (conditional plural third-person)
nitradent (imperfect indicative plural subjunctive third-person)
nitredid (conditional impersonal)
nitredid (imperfect impersonal indicative subjunctive)
nitredais (first-person preterite singular)
nitredaist (preterite second-person singular)
nitradodd (preterite singular third-person)
nitradasom (first-person plural preterite)
nitradasoch (plural preterite second-person)
nitradasant (plural preterite third-person)
nitradwyd (impersonal preterite)
nitradaswn (first-person pluperfect singular)
nitradasit (pluperfect second-person singular)
nitradasai (pluperfect singular third-person)
nitradasem (first-person pluperfect plural)
nitradasech (pluperfect plural second-person)
nitradasent (pluperfect plural third-person)
nitradasid (impersonal pluperfect)
nitradesid (impersonal pluperfect)
nitradwyf (first-person present singular subjunctive)
nitredych (present second-person singular subjunctive)
nitrado (present singular subjunctive third-person)
nitradom (first-person plural present subjunctive)
nitradoch (plural present second-person subjunctive)
nitradont (plural present subjunctive third-person)
nitrader (impersonal present subjunctive)
nitrada (imperative second-person singular)
nitraded (imperative singular third-person)
nitradwn (first-person imperative plural)
nitredwch (imperative plural second-person)
nitradwch (imperative plural second-person)
nitradent (imperative plural third-person)
nitrader (imperative impersonal)
nitradu (noun-from-verb singular)
nitradedig (participle singular)
nitradadwy (participle singular)
nitrada i (first-person future singular)
nitradaf i (first-person future singular)
nitradi di (future second-person singular)
nitradith o (future singular third-person)
e (future singular third-person)
hi (future singular third-person)
nitradiff e (future singular third-person)
nitradwn ni (first-person future plural)
nitradwch chi (future plural second-person)
nitradan nhw (future plural third-person)
nitradwn i (conditional first-person singular)
nitradswn i (conditional first-person singular)
nitradet ti (conditional second-person singular)
nitradset ti (conditional second-person singular)
nitradai fo (conditional singular third-person)
fe (conditional singular third-person)
hi (conditional singular third-person)
nitradsai fo (conditional singular third-person)
nitraden ni (conditional first-person plural)
nitradsen ni (conditional first-person plural)
nitradech chi (conditional plural second-person)
nitradsech chi (conditional plural second-person)
nitraden nhw (conditional plural third-person)
nitradsen nhw (conditional plural third-person)
nitradais i (first-person preterite singular)
nitrades i (first-person preterite singular)
nitradaist ti (preterite second-person singular)
nitradest ti (preterite second-person singular)
nitradodd o (preterite singular third-person)
e (preterite singular third-person)
hi (preterite singular third-person)
nitradon ni (first-person plural preterite)
nitradoch chi (plural preterite second-person)
nitradon nhw (plural preterite third-person)
nitrada (imperative second-person singular)
nitradwch (imperative plural second-person)


ffenol

Borrowed from English phenol. By surface analysis, ffeno- (“pheno-”) + -ol


ffenolig

cy-adj

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

ffenolig (feminine singular)
ffenolig (plural)

Borrowed from English phenol. By surface analysis, ffenol + -ig.


ffeno-

(organic chemistry) pheno- (containing phenol)


asid fformig

(organic chemistry) Synonym of asid methanöig (“methanoic acid”), formic acid


asid methanöig

(organic chemistry) methanoic acid, formic acid.


methanöig

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

methanöig (feminine singular)
methanöig (plural)

/ˌmɛθaˈnoː.ɪɡ/

From English methanoic. By surface analysis, methan (“methane”) + -öig.


bwtanöig

cy-adj

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

bwtanöig (feminine singular)
bwtanöig (plural)

By surface analysis, bwtan (“butane”) + -öig


ethanöig

cy-adj

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

ethanöig (feminine singular)
ethanöig (plural)

By surface analysis, ethan (“ethane”) + -öig


pentanöig

cy-adj

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

pentanöig (feminine singular)
pentanöig (plural)

By surface analysis, pentan (“pentane”) + -öig


propanöig

cy-adj

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

propanöig (feminine singular)
propanöig (plural)

By surface analysis, propan (“propane”) + -öig


hecsanöig

cy-adj

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

hecsanöig (feminine singular)
hecsanöig (plural)

By surface analysis, hecsan (“hexane”) + -öig


capröig

cy-adj

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

capröig (feminine singular)
capröig (plural)

Borrowed from English caproic. By surface analysis, Latin caper (“goat”) + -öig.

surface analysis

(organic chemistry) Synonym of hecsanöig (“hexanoic”), caproic


-öig

(organic chemistry) -oic (suffix denoting carboxylic groups)


fformig

cy-adj

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

fformig (feminine singular)
fformig (plural)

(organic chemistry) Synonym of methanöig (“methanoic”), formic


nitrig

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

nitrig (feminine singular)
nitrig (plural)


nitrus

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

nitrus (feminine singular)
nitrus (plural)


sylff-

(organic chemistry) Alternative form of sylffo- (“containing sulfur”), used before a vowel


sylffo-

(organic chemistry) sulfo- (containing sulfur)


bwtylamin

Adapted from English butylamine. By surface analysis, bwtyl- + -amin.


ethylamin

Adapted from English ethylamine. By surface analysis, ethyl- + -amin.


methylamin

Adapted from English methylamine. By surface analysis, methyl- + -amin.


propylamin

Adapted from English propylamine. By surface analysis, propyl- + -amin.


nitrobensen

Adapted borrowing of English nitrobenzene. By surface analysis, nitro- + bensen

adapted borrowing

(organic chemistry) nitrobenzene (aromatic compound C₆H₅NO₂)


asetig

cy-adj

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

asetig (feminine singular)
asetig (plural)

(organic chemistry) Synonym of ethanöig (“ethanoic”), acetic


moleciwlaidd

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

moleciwlaidd (feminine singular)
moleciwlaidd (plural)
moleciwlaidd
foleciwlaidd (soft)

Adapted from English molecular. By surface analysis, moleciwl (“molecule”) + -aidd.


moleciwl

moleciwlau (plural)
moleciwl
foleciwl (soft)


isomeredd adeileddol

structural isomerism
structural isomerism


isomer adeileddol

cy-noun

isomer adeileddol m (plural isomerau adeileddol)


isomer optegol

isomer optegol m (plural isomerau optegol)


esteriad

esteriadau (plural)
esteriad
hesteriad (prothesis-h)


esteru

cy-verb

esteru (first-person singular present esteraf)

esteraf (first-person present singular)
esteraf (first-person future indicative present singular)
esteri (future indicative present second-person singular)
estera (future indicative present singular third-person)
esterwn (first-person future indicative plural present)
esterwch (future indicative plural present second-person)
esterant (future indicative plural present third-person)
esterir (future impersonal indicative present)
esterwn (conditional first-person singular)
esterwn (first-person imperfect indicative singular subjunctive)
esterit (conditional second-person singular)
esterit (imperfect indicative second-person singular subjunctive)
esterai (conditional singular third-person)
esterai (imperfect indicative singular subjunctive third-person)
esterem (conditional first-person plural)
esterem (first-person imperfect indicative plural subjunctive)
esterech (conditional plural second-person)
esterech (imperfect indicative plural second-person subjunctive)
esterent (conditional plural third-person)
esterent (imperfect indicative plural subjunctive third-person)
esterid (conditional impersonal)
esterid (imperfect impersonal indicative subjunctive)
esterais (first-person preterite singular)
esteraist (preterite second-person singular)
esterodd (preterite singular third-person)
esterasom (first-person plural preterite)
esterasoch (plural preterite second-person)
esterasant (plural preterite third-person)
esterwyd (impersonal preterite)
esteraswn (first-person pluperfect singular)
esterasit (pluperfect second-person singular)
esterasai (pluperfect singular third-person)
esterasem (first-person pluperfect plural)
esterasech (pluperfect plural second-person)
esterasent (pluperfect plural third-person)
esterasid (impersonal pluperfect)
esteresid (impersonal pluperfect)
esterwyf (first-person present singular subjunctive)
esterych (present second-person singular subjunctive)
estero (present singular subjunctive third-person)
esterom (first-person plural present subjunctive)
esteroch (plural present second-person subjunctive)
esteront (plural present subjunctive third-person)
esterer (impersonal present subjunctive)
estera (imperative second-person singular)
estered (imperative singular third-person)
esterwn (first-person imperative plural)
esterwch (imperative plural second-person)
esterent (imperative plural third-person)
esterer (imperative impersonal)
esteru (noun-from-verb singular)
esteredig (participle singular)
esteradwy (participle singular)
estera i (first-person future singular)
esteraf i (first-person future singular)
esteri di (future second-person singular)
esterith o (future singular third-person)
e (future singular third-person)
hi (future singular third-person)
esteriff e (future singular third-person)
esterwn ni (first-person future plural)
esterwch chi (future plural second-person)
esteran nhw (future plural third-person)
esterwn i (conditional first-person singular)
esterswn i (conditional first-person singular)
esteret ti (conditional second-person singular)
esterset ti (conditional second-person singular)
esterai fo (conditional singular third-person)
fe (conditional singular third-person)
hi (conditional singular third-person)
estersai fo (conditional singular third-person)
esteren ni (conditional first-person plural)
estersen ni (conditional first-person plural)
esterech chi (conditional plural second-person)
estersech chi (conditional plural second-person)
esteren nhw (conditional plural third-person)
estersen nhw (conditional plural third-person)
esterais i (first-person preterite singular)
esteres i (first-person preterite singular)
esteraist ti (preterite second-person singular)
esterest ti (preterite second-person singular)
esterodd o (preterite singular third-person)
e (preterite singular third-person)
hi (preterite singular third-person)
esteron ni (first-person plural preterite)
esteroch chi (plural preterite second-person)
esteron nhw (plural preterite third-person)
estera (imperative second-person singular)
esterwch (imperative plural second-person)
esteru
hesteru (prothesis-h)

(organic chemistry, transitive) to esterify


clorig

cy-adj

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

clorig (feminine singular)
clorig (plural)


clorus

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

clorus (feminine singular)
clorus (plural)


clorobensen

Adapted borrowing of English chlorobenzene. By surface analysis, cloro- + bensen


asid ethanöig

(organic chemistry) ethanoic acid, acetic acid


asid asetig

(organic chemistry) Synonym of asid ethanöig (“ethanoic acid”), acetic acid


asid carbocsylig

cy-noun

asid carbocsylig m (plural asidau carbocsylig or asid carbocsyligion)

asidau carbocsylig (plural)
asid carbocsyligion (plural)


carbocsylig

cy-adj

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

carbocsylig (feminine singular)
carbocsylig (plural)

Borrowed from English carboxylic. By surface analysis, carbocsyl + -ig.


asid brasterog

cy-noun

asid brasterog m (plural asidau brasterog or asid brasterogion)

asidau brasterog (plural)
asid brasterogion (plural)

(organic chemistry, biochemistry) fatty acid.


asid glyserig

(organic chemistry, biochemistry) glyceric acid


arian nitrad

(inorganic chemistry) silver nitrate, AgNO₃


osgled

osgledau (plural)
osgled
hosgled (prothesis-h)

osg (“sloping object”) + lled (“width”).


osgiliad

osgiadedau (plural)
osgiliad
hosgiliad (prothesis-h)

Back-formation from osgiliadu (“to oscillate”).


ffosffad

cy-noun

ffosffad m (plural ffosffadau, not mutable)

Borrowed from English phosphate. By surface analysis, ffosff- (“phosph-”) + -ad (“-ate”).


manganad

Borrowed from English manganate. By surface analysis, mangan- (“mangan-”) + -ad (“-ate”).


hydrobromid

Internationalism based on English hydrobromide. By surface analysis, hydro- + bromid.

Mae’n llai tebygol o achosi syrthni na hyosin hydrobromid.

2020 September, Cymdeithas Clefyd Niwronau Echddygol, 7A – Problemau llyncu [7A – Swallowing difficulties], Northampton: Motor Neurone Disease Association, adran 2: “Sut gallaf reoli problemau gyda’r poer?” [section 2: “How can I manage difficulties with saliva?”], page 8:

It is less likely to cause drowsiness than hyoscine hydrobromide.

(organic chemistry) hydrobromide (compound of hydrobromic acid with an organic base)


cnwc

cy-noun

cnwc m (plural cnyciau, diminutive cnwcyn or cnycyn)

cnyciau (plural)
cnwcyn (diminutive)
cnycyn (diminutive)
cnwc
gnwc (soft)
nghnwc
chnwc
cwnwg (alternative)
cnwcc (alternative obsolete)
cnwch (alternative obsolete)
knwk (alternative obsolete)

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)


sgaffald

sgaffald m (plural sgaffaldau or sgaffaldiau, not mutable)

sgaffaldau (plural)
sgaffaldiau (plural)


gêr

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

gerau (plural)
geriau (plural)
gêrs (plural)
gêr
ngêr


gyriant cripian

gyriant cripian m (plural gyriannau cripian)


gyriant cadwyn

gyriant cadwyn m (plural gyriannau cadwyn)

(mechanics) chain drive, chain transmission


ceuffon

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


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


hydoddiant byffer

cy-noun

hydoddiant byffer m (plural hydoddiannau byffer, not mutable)


glyserig

cy-adj

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

glyserig (feminine singular)
glyserig (plural)

/ɡlɨ̞ˈsɛrɪɡ/

/ɡlɪˈseːrɪɡ/


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 singular)
datywasgedig (participle singular)
datywasgadwy (participle singular)
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
ddatgywasgu (soft)
natgywasgu

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

(computing) to decompress (to restore compressed data)


halwyn

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


buanedd

cy-noun

buanedd m (usually uncountable, plural buaneddau)

buaneddau (plural)
buanedd
fuanedd (soft)
muanedd


ardrawiad

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


sgalar

cy-adj

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

sgalar (feminine singular)
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)


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)
fectora (imperative second-person singular)
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 singular)
fectoredig (participle singular)
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


graffigol

cy-adj

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

graffigol (feminine singular)
graffigol (plural)
graffigol
raffigol (soft)
ngraffigol

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


echreiddiad

echreiddiadau (plural)
echreiddiad
hechreiddiad (prothesis-h)

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


echreiddig

cy-adj

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
hechreiddig (prothesis-h)


aligylchol

cy-adj

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

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

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


aliffatig

cy-adj

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

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


amledd

cy-noun

amledd m (usually uncountable, plural amleddau)

amleddau (plural)
amledd
hamledd (prothesis-h)


affinedd

affineddau (plural)
affinedd
haffinedd (prothesis-h)


amgrwm

cy-adj

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

amgrom (feminine singular)
amgrymion (plural)
amgrwm
hamgrwm (prothesis-h)

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


ceugrwm

cy-adj

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

ceugrom (feminine singular)
ceugrwm (plural)
ceugrwm
geugrwm (soft)
ngheugrwm
cheugrwm


ecsentrig

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
hecsentrig (prothesis-h)


egni cinetig

egni cinetig
hegni cinetig (prothesis-h)


cinetig

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

cinetig (feminine singular)
cinetig (plural)
cinetig
ginetig (soft)
nghinetig
chinetig


deuol

deuolau (plural)
deuol
ddeuol (soft)
neuol

Adapted borrowing of English diol, with phono-semantic matching to appear like an extension of Etymology 1.


gwahaniaeth potensial

gwahaniaeth potensial
wahaniaeth potensial (soft)
ngwahaniaeth potensial

potential difference
potential difference


isomorffedd

cy-noun

isomorffedd m (usually uncountable, plural isomorffeddau)

isomorffeddau (plural)
isomorffedd
hisomorffedd (prothesis-h)

(biology, chemistry, physics) isomorphism


amledd cysain

amledd cysain m (plural amleddau cysain)

amleddau cysain (plural)
amledd cysain
hamledd cysain (prothesis-h)


isorsaf

isorsafoedd (plural)
isorsaf
hisorsaf (prothesis-h)

electrical engineering
electrical engineering

(electrical engineering) electrical substation


newidydd codi

newidydd codi m (plural newidyddion codi, not mutable)

(physics, electrical engineering) step-up transformer


newidydd gostwng

newidydd gostwng m (plural newidyddion gostwng, not mutable)

step-down transformer
step-down transformer

(physics, electrical engineering) step-down transformer


allanu

cy-verb

allanu (first-person singular present allanaf)


ffwythiant

cy-noun

ffwythiant m (plural ffwythiannau, not mutable)

Adapted borrowing of Latin fūnctiō + -iant, with the conceit of applying sound changes that affected Latin loans inherited by Welsh from Common Brittonic.


malig

cy-adj

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

malig (feminine singular)
malig (plural)

Internationalism (see English malic), ultimately from French malique.


dargludiad

dargludiad
ddargludiad (soft)
nargludiad

(physics) conduction (of electricity, heat, light or sound)


dargludol

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

dargludol (feminine singular)
dargludol (plural)
mor ddargludol (equative)
mwy dargludol (comparative)
mwyaf dargludol (superlative)
dargludol
ddargludol (soft)
nargludol

(physics) conductive, conducting (of electricity, heat, light or sound)


dargludedd

dargludedd
ddargludedd (soft)
nargludedd

(physics) conductivity (of electricity, heat, light or sound)


dargludiant

dargludiant
ddargludiant (soft)
nargludiant

(physics) conductance (of electricity, heat, light or sound)


amldonfedd

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

amldonfedd (feminine singular)
amldonfedd (plural)
amldonfedd
hamldonfedd (prothesis-h)

aml- (“multi-”) + tonfedd (“wavelength”).

af

Model amldonfedd i ddelweddu a dadansoddi meysydd magnetig yng nghorona’r Haul

2014 September 18, Jeff Smith, Gwerddon:

A multiwavelength model to image and analyse magnetic fields in the Sun's corona


cyfansawdd

cy-noun

cyfansawdd m (plural cyfansoddion or cyfansoddiau or cyfansawddau)

cyfansoddion (plural)
cyfansoddiau (plural)
cyfansawddau (plural)

compound, composite
(chemistry) compound


gorddirlawn

cy-adj

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

gorddirlawn (feminine singular)
gorddirlawn (plural)
mor orddirlawn (equative)
mwy gorddirlawn (comparative)
mwyaf gorddirlawn (superlative)
gorddirlawn
orddirlawn (soft)
ngorddirlawn

gor- (“too, very”) + dirlawn (“saturated”).


gordrwythedig

cy-adj

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

gordrwythedig (feminine singular)
gordrwythedig (plural)
mor ordrwythedig (equative)
mwy gordrwythedig (comparative)
mwyaf gordrwythedig (superlative)
gordrwythedig
ordrwythedig (soft)
ngordrwythedig

/ɡɔrdrʊɨ̯ˈθɛdɪɡ/

/ɡɔrdrʊi̯ˈθeːdɪɡ/

/ɡɔrdrʊi̯ˈθɛdɪɡ/

gor- (“too, very”) + trwythedig (“saturated”).


cofalent

cy-adj

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

cofalent (feminine singular)
cofalent (plural)
cyfalent (alternative)

Internationalism.
Borrowed from English covalent.


ïonig

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

ïonig (feminine singular)
ïonig (plural)
iönig (alternative)

Internationalism
borrowed from English ionic. By surface analysis, ïon (“ion”) + -ig.


disg hyblyg

disgiau hyblyg (plural)
disg hyblyg
ddisg hyblyg (soft)
nisg hyblyg


disg caled

disgiau caled (plural)
disg caled
ddisg caled (soft)
nisg caled


disgyrrwr

disgyrwyr (plural)
disgyrrwr
ddisgyrrwr (soft)
nisgyrrwr

Calque of English disk drive. By surface analysis, disg (“disk”) + gyrrwr (“driver”).


disg llipa

disgiau llipa (plural)
disg llipa
ddisg llipa (soft)
nisg llipa


trylediad

trylediad
drylediad (soft)
nhrylediad
thrylediad


tryledu

cy-verb

tryledu (first-person singular present tryledaf)

tryledaf (first-person present singular)
tryledaf (first-person future indicative present singular)
tryledi (future indicative present second-person singular)
tryled (future indicative present singular third-person)
tryleda (future indicative present singular third-person)
tryledwn (first-person future indicative plural present)
tryledwch (future indicative plural present second-person)
tryledant (future indicative plural present third-person)
tryledir (future impersonal indicative present)
tryledwn (conditional first-person singular)
tryledwn (first-person imperfect indicative singular subjunctive)
tryledit (conditional second-person singular)
tryledit (imperfect indicative second-person singular subjunctive)
tryledai (conditional singular third-person)
tryledai (imperfect indicative singular subjunctive third-person)
tryledem (conditional first-person plural)
tryledem (first-person imperfect indicative plural subjunctive)
tryledech (conditional plural second-person)
tryledech (imperfect indicative plural second-person subjunctive)
tryledent (conditional plural third-person)
tryledent (imperfect indicative plural subjunctive third-person)
tryledid (conditional impersonal)
tryledid (imperfect impersonal indicative subjunctive)
tryledais (first-person preterite singular)
tryledaist (preterite second-person singular)
tryledodd (preterite singular third-person)
tryledasom (first-person plural preterite)
tryledasoch (plural preterite second-person)
tryledasant (plural preterite third-person)
tryledwyd (impersonal preterite)
tryledaswn (first-person pluperfect singular)
tryledasit (pluperfect second-person singular)
tryledasai (pluperfect singular third-person)
tryledasem (first-person pluperfect plural)
tryledasech (pluperfect plural second-person)
tryledasent (pluperfect plural third-person)
tryledasid (impersonal pluperfect)
tryledesid (impersonal pluperfect)
tryledwyf (first-person present singular subjunctive)
tryledych (present second-person singular subjunctive)
tryledo (present singular subjunctive third-person)
tryledom (first-person plural present subjunctive)
tryledoch (plural present second-person subjunctive)
tryledont (plural present subjunctive third-person)
tryleder (impersonal present subjunctive)
tryled (imperative second-person singular)
tryleda (imperative second-person singular)
tryleded (imperative singular third-person)
tryledwn (first-person imperative plural)
tryledwch (imperative plural second-person)
tryledent (imperative plural third-person)
tryleder (imperative impersonal)
tryledu (noun-from-verb singular)
trylededig (participle singular)
tryledadwy (participle singular)
tryleda i (first-person future singular)
tryledaf i (first-person future singular)
tryledi di (future second-person singular)
tryledith o (future singular third-person)
e (future singular third-person)
hi (future singular third-person)
trylediff e (future singular third-person)
tryledwn ni (first-person future plural)
tryledwch chi (future plural second-person)
tryledan nhw (future plural third-person)
tryledwn i (conditional first-person singular)
tryledswn i (conditional first-person singular)
tryledet ti (conditional second-person singular)
tryledset ti (conditional second-person singular)
tryledai fo (conditional singular third-person)
fe (conditional singular third-person)
hi (conditional singular third-person)
tryledsai fo (conditional singular third-person)
tryleden ni (conditional first-person plural)
tryledsen ni (conditional first-person plural)
tryledech chi (conditional plural second-person)
tryledsech chi (conditional plural second-person)
tryleden nhw (conditional plural third-person)
tryledsen nhw (conditional plural third-person)
tryledais i (first-person preterite singular)
tryledes i (first-person preterite singular)
tryledaist ti (preterite second-person singular)
tryledest ti (preterite second-person singular)
tryledodd o (preterite singular third-person)
e (preterite singular third-person)
hi (preterite singular third-person)
tryledon ni (first-person plural preterite)
tryledoch chi (plural preterite second-person)
tryledon nhw (plural preterite third-person)
tryleda (imperative second-person singular)
tryledwch (imperative plural second-person)
tryledu
dryledu (soft)
nhryledu
thryledu

try- (“through-”) + lledu (“to spread, to broaden”)


diffreithio

cy-verb

diffreithio (first-person singular present diffeithiaf)

diffeithiaf (first-person present singular)
diffreithio
ddiffreithio (soft)
niffreithio


diffreithiant

diffreithiant
ddiffreithiant (soft)
niffreithiant

From diffreithio (“to diffract”) + -ant.


tabl cyfnodol

tabl cyfnodol
dabl cyfnodol (soft)
nhabl cyfnodol
thabl cyfnodol


radical rhydd

cy-noun

radical rhydd m (uncountable, not mutable)


aromatig

cy-adj

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

aromatig (feminine singular)
aromatig (plural)
mor aromatig (equative)
mwy aromatig (comparative)
mwyaf aromatig (superlative)
aromatig
haromatig (prothesis-h)


syrthni

cy-noun

syrthni m or f (uncountable, not mutable)


trawsnewidiad gwedd

trawsnewidiad gwedd m (plural trawsnewidiadau gwedd)

trawsnewidiadau gwedd (plural)
trawsnewidiad gwedd
drawsnewidiad gwedd (soft)
nhrawsnewidiad gwedd
thrawsnewidiad gwedd


mater tywyll

(astrophysics, cosmology, particle physics) dark matter


cyflymydd

/kəvˈləmɨ̞ð/


catalydd

Adapted borrowing of English catalyst + -ydd.


catalytig

cy-adj

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

catalytig (feminine singular)
catalytig (plural)

Learned borrowing from English catalytic + -ig.


mân-lun

mân-luniau (plural)
mân-lun
fân-lun (soft)


coloidaidd

cy-adj

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

coloidaidd (feminine singular)
coloidaidd (plural)
coloidaidd
goloidaidd (soft)
ngholoidaidd
choloidaidd

Adapted borrowing of English colloidal. By surface analysis, coloid + -aidd.


gyriant fflach

cy-noun

gyriant fflach m (plural gyriannau fflach)


gwyrdroi

cy-verb

gwyrdroi (first-person singular present gwyrdrôf or gwyrdroaf)

gwyrdrôf (first-person present singular)
gwyrdroaf (first-person present singular)
gwyrdroi
wyrdroi (soft)
ngwyrdroi

From gŵyr (“aslant, askew”) + troi (“turn”).


lluosydd

lluosyddion (plural)
lluosydd
luosydd (soft)

(arithmetic, economics, physics) multiplier


cryno-lun

mân-luniau (plural)
cryno-lun
gryno-lun (soft)
nghryno-lun
chryno-lun


gwrthdorri

gwrthdorri (first-person singular present gwrthdorraf)

gwrthdorraf (first-person present singular)
gwrthdorri
wrthdorri (soft)
ngwrthdorri

From gwrth- (“anti-”) + torri (“to cut, to break”).


llechen

llechennau (plural)
llechan (alternative North-Wales)

(computing) slate, tablet, tablet computer