amethyst

amethystau (plural)
amethyst (mutation mutation-radical)
hamethyst (mutation prothesis-h)


pant

pantiau (plural)
pant (mutation mutation-radical)
bant (mutation mutation-soft)
mhant (mutation mutation-nasal)
phant (mutation mutation-aspirate)

From Proto-Celtic *kʷantyos "flat hill", compare Pictish ᚘᚐᚅᚈ (pant, “hollow”).

hollow, depression, small valley, dingle, dell


bro

bröydd (plural)
brofydd (plural)
bro (mutation mutation-radical)
fro (mutation mutation-soft)
mro (mutation mutation-nasal)

From Middle Welsh bro, from Proto-Brythonic *broɣ, from Proto-Celtic *mrogis. Cognate with Old Irish mruig. Cognate with Briton bro.

region, country, land, neighbourhood, native haunt


mynydd

mynyddoedd (plural)
mynydd (mutation mutation-radical)
fynydd (mutation mutation-soft)

From Middle Welsh mynyð, from Proto-Brythonic *mönɨð, from Proto-Celtic *moniyos (compare Cornish menydh, Breton menez), from Proto-Indo-European *men- (“to tower, stand out”) (compare Latin mōns).


wybr

wybrau (plural)
wybr (mutation mutation-radical)
hwybr (mutation prothesis-h)


ystad

From Middle Welsh ystad, from Proto-Brythonic *ɨstad, from Latin status (compare Portuguese and Spanish estado, Occitan and Catalan estat, French été, état, Sardinian istadu, etc.).


breg

bregion (plural)
breg (mutation mutation-radical)
freg (mutation mutation-soft)
mreg (mutation mutation-nasal)

Perhaps borrowed either from Middle English breck (“breach; failing”) or from Old Irish bréc (“lie, deception”).


cors

corsydd (plural)
cors (mutation mutation-radical)
gors (mutation mutation-soft)
nghors (mutation mutation-nasal)
chors (mutation mutation-aspirate)

From Proto-Celtic *korks; related to Cornish kors (“reeds”), Breton korz (“reeds”), and further to Old Irish curchais (“reedbed”), and perhaps to Latin cārex (“sedge”). Cameron connects Proto-Indo-European *(s)kerbʰ- (“to turn (around), wind”), on the basis of Latin scirpus, reasoning that reeds and bulrushes were formerly used to make ropes. However, this root gave Middle Irish corb (“wagon(-seat)”), making it phonetically unlikely.


topas

topas (mutation mutation-radical)
dopas (mutation mutation-soft)
nhopas (mutation mutation-nasal)
thopas (mutation mutation-aspirate)

Borrowed from English topaz, from Old French topace, from Ancient Greek τόπαζος (tópazos).


perl

perlau (plural)
perl (mutation mutation-radical)
berl (mutation mutation-soft)
mherl (mutation mutation-nasal)
pherl (mutation mutation-aspirate)

From Middle Welsh perl, from Middle English perle, from Old French perle, from Medieval Latin perula (literally “little pear”).


cylch

cy-noun

cylch m (plural cylchoedd or cylchau or cylchon or cylchion)

cylchoedd (plural)
cylchau (plural)
cylchon (plural)
cylchion (plural)
cylch (mutation mutation-radical)
gylch (mutation mutation-soft)
nghylch (mutation mutation-nasal)
chylch (mutation mutation-aspirate)

From Middle Welsh kylch, from Old Welsh circhl, from Proto-Brythonic *kɨrxl, borrowed from Latin circulus. Compare Breton kelc'h and Cumbric kelchyn.


trwyn

trwynau (plural)
trwyn (mutation mutation-radical)
drwyn (mutation mutation-soft)
nhrwyn (mutation mutation-nasal)
thrwyn (mutation mutation-aspirate)

From Proto-Celtic *trognī- (“nose”), with further origin uncertain; perhaps related to ffroen (“nostril”). Cognate with Cornish troen, Breton stroen, and also with French trogne via Gaulish trugna (“nose, snout”).


gro

gröyn (singulative)
gro (mutation mutation-radical)
ro (mutation mutation-soft)
ngro (mutation mutation-nasal)

From Proto-Brythonic *grọw, from Proto-Celtic *grāwā.


paith

peithiau (plural)
paith (mutation mutation-radical)
baith (mutation mutation-soft)
mhaith (mutation mutation-nasal)
phaith (mutation mutation-aspirate)

According to the GPC, a corruption from earlier diffaith (“derelict, desolate”), itself a borrowing from Latin defectus (“emptiness, absence”). The evolution of the initial consonant remains unclear; perhaps from f to p through an intermediary b. Compare the second element of gobaith (“trust, hope”).


cefn

cefn m (plural cefnau or cefnoedd or cefnydd)

cefnau (plural)
cefnoedd (plural)
cefnydd (plural)
cefn (mutation mutation-radical)
gefn (mutation mutation-soft)
nghefn (mutation mutation-nasal)
chefn (mutation mutation-aspirate)

From Middle Welsh keuen. Related to Breton kein (“back”), Cornish keyn (“back”), Gaulish Cebenna (“ridge, height”) (whence French Cévennes).

ar gefn

in addition to, as a consequence of, with regard to; at the expense of; on top, upon, up to

cefn lloer

full moon; crescent of the moon, half moon

cefnog

backed, having a back; strong, stout brave

yng nghefn

behind one's back, underhand; following, pursuing

(geology) vertical furrow, fissure or fault in a rock


tyle

tyleau (plural)
tyle (mutation mutation-radical)
dyle (mutation mutation-soft)
nhyle (mutation mutation-nasal)
thyle (mutation mutation-aspirate)

(South Wales) steep (upward) road or path; steep gradient or slope.


llaid

lleidiau (plural)
llaid (mutation mutation-radical)
laid (mutation mutation-soft)

From Proto-Brythonic *llėd, from Proto-Celtic *latyos (“moist”), from Proto-Indo-European *lat- (“damp, wet”), see also Old Norse leðja (“mud”), Albanian lag (“to moisten”). Cognate with Cornish leys.

(veterinary medicine) mud fever, foot rot


anialwch

anialwch (mutation mutation-radical)
hanialwch (mutation prothesis-h)


rhiw

rhiwiau (plural)
rhiw (mutation mutation-radical)
riw (mutation mutation-soft)

Usually attested in placenames, such as Carew, parallel to the Cornish suffix -rew, but of obscure origin.


Awstralia

Awstralia (mutation mutation-radical)
Hawstralia (mutation prothesis-h)

(geology) Australia (a continent consisting of the islands of Australia, New Guinea and intervening islands)


daearyddiaeth

daearyddiaeth f (plural daearyddiaethau)

daearyddiaethau (plural)
daearyddiaeth (mutation mutation-radical)
ddaearyddiaeth (mutation mutation-soft)
naearyddiaeth (mutation mutation-nasal)

/ˌdeɨ̯aˈrəðjaɨ̯θ/

/ˌdeɨ̯aˈrəðjɛθ/


cilfach

cilfachau (plural)
cilfach (mutation mutation-radical)
gilfach (mutation mutation-soft)
nghilfach (mutation mutation-nasal)
chilfach (mutation mutation-aspirate)

(geography) creek, inlet of the sea, bay


mantell

mentyll (plural)
mantell (mutation mutation-radical)
fantell (mutation mutation-soft)

From Latin mantellum (“cloak”), diminutive of mantum, of Gaulish origin.


gwregys

gwregysau (plural)
gwregys (mutation mutation-radical)
wregys (mutation mutation-soft)
ngwregys (mutation mutation-nasal)

With metathesis from Old Welsh guecrissou, from Proto-Brythonic *gwö-krissus (“belt”, literally “below-shirt”) (compare Cornish grugys, Breton gouriz), derived from Proto-Celtic *krissus, whence Welsh crys (“shirt”).


gradd

graddau (plural)
gradd (mutation mutation-radical)
radd (mutation mutation-soft)
ngradd (mutation mutation-nasal)

From Middle Welsh grað, from Proto-Brythonic *grað, from Latin gradus (“degree”). Doublet of gris.

(geography) degree (unit of measurement of latitude and longitude)


cyfandir

cyfandiroedd (plural)
cyfandir (mutation mutation-radical)
gyfandir (mutation mutation-soft)
nghyfandir (mutation mutation-nasal)
chyfandir (mutation mutation-aspirate)

From cyfan (“whole”) + tir (“land”); compare Breton kevandir.

cyfandirwr

continental, person from continental Europe


cawod

cawodau (plural)
cawodydd (plural)
cawod (mutation mutation-radical)
gawod (mutation mutation-soft)
nghawod (mutation mutation-nasal)
chawod (mutation mutation-aspirate)

From Middle Welsh cawat, from Proto-Celtic *kowotos (compare Cornish kowas, Breton kaouad), from Proto-Indo-European *(s)ḱeh₁w- (“cold, rainy; north”); compare Latin caurus (“northwestern wind”), Lithuanian šiáurė (“north”), Russian се́вер (séver, “north”).


sgri

From English scree from Old Norse skriða (“landslide, landslip”).


emrallt

emralltiau (plural)
emrallt (mutation mutation-radical)
hemrallt (mutation prothesis-h)


ynysig

ynysigau (plural)
ynysig (mutation mutation-radical)
hynysig (mutation prothesis-h)


sychnant

cy-noun

sychnant f (plural sychnentydd, not mutable)

From sych (“dry, arid”) + nant (“river, stream”).


gwerddon

gwerddonau (plural)
gwerddon (mutation mutation-radical)
werddon (mutation mutation-soft)
ngwerddon (mutation mutation-nasal)


llaered

llaered (mutation mutation-radical)
laered (mutation mutation-soft)

part of shore between high and low water marks which may be crossed at low tide, strand.


torlan

cy-noun

torlan f (plural torlannau or torlennydd)

torlannau (plural)
torlennydd (plural)
torlan (mutation mutation-radical)
dorlan (mutation mutation-soft)
nhorlan (mutation mutation-nasal)
thorlan (mutation mutation-aspirate)

From tor (“a break(ing)”) + glan (“(river) bank”).


cadlas

cadlasau (plural)
cadlesi (plural)
cadlas (mutation mutation-radical)
gadlas (mutation mutation-soft)
nghadlas (mutation mutation-nasal)
chadlas (mutation mutation-aspirate)


culdir

culdiroedd (plural)
culdir (mutation mutation-radical)
guldir (mutation mutation-soft)
nghuldir (mutation mutation-nasal)
chuldir (mutation mutation-aspirate)


peiran

peiranau (plural)
peiran (mutation mutation-radical)
beiran (mutation mutation-soft)
mheiran (mutation mutation-nasal)
pheiran (mutation mutation-aspirate)


daeareg

daeareg (mutation mutation-radical)
ddaeareg (mutation mutation-soft)
naeareg (mutation mutation-nasal)


ffawt

Borrowed from Middle English faute. Doublet of ffôt.

Mae llinell ffawt yn rhedeg o'r Gogledd i'r De trwy ganol yr Eidal.

A fault line runs from north to south through the middle of Italy.


gogwyddiad

gogwyddiadau (plural)
gogwyddiad (mutation mutation-radical)
ogwyddiad (mutation mutation-soft)
ngogwyddiad (mutation mutation-nasal)


nawnlin

cy-noun

nawnlin f (plural nawnlinau or nawnliniau, not mutable)


calch

calchoedd (plural)
calch (mutation mutation-radical)
galch (mutation mutation-soft)
nghalch (mutation mutation-nasal)
chalch (mutation mutation-aspirate)


effaith tŷ gwydr

effaith tŷ gwydr (mutation mutation-radical)
heffaith tŷ gwydr (mutation prothesis-h)


pegwn

pegwnau (plural)
pegwn (mutation mutation-radical)
begwn (mutation mutation-soft)
mhegwn (mutation mutation-nasal)
phegwn (mutation mutation-aspirate)


allglofan

allglofannau (plural)
allglofan (mutation mutation-radical)
hallglofan (mutation prothesis-h)


clofan

clofannau (plural)
clofan (mutation mutation-radical)
glofan (mutation mutation-soft)
nghlofan (mutation mutation-nasal)
chlofan (mutation mutation-aspirate)


goror

gororau (plural)
gororion (plural)
goror (mutation mutation-radical)
oror (mutation mutation-soft)
ngoror (mutation mutation-nasal)


estynwlad

estynwledydd (plural)
estynwlad (mutation mutation-radical)
hestynwlad (mutation prothesis-h)

From estyn (“to extend”) + gwlad (“country, land”).


estyn

cy-verb

estyn (first-person singular present estynnaf)

estynnaf (first-person present singular)
estynnaf (first-person future indicative present singular)
estynni (future indicative present second-person singular)
estyn (future indicative present singular third-person)
estynna (future indicative present singular third-person)
estynnwn (first-person future indicative plural present)
estynnwch (future indicative plural present second-person)
estynnant (future indicative plural present third-person)
estynnir (future impersonal indicative present)
estynnwn (conditional first-person singular)
estynnwn (first-person imperfect indicative singular subjunctive)
estynnit (conditional second-person singular)
estynnit (imperfect indicative second-person singular subjunctive)
estynnai (conditional singular third-person)
estynnai (imperfect indicative singular subjunctive third-person)
estynnem (conditional first-person plural)
estynnem (first-person imperfect indicative plural subjunctive)
estynnech (conditional plural second-person)
estynnech (imperfect indicative plural second-person subjunctive)
estynnent (conditional plural third-person)
estynnent (imperfect indicative plural subjunctive third-person)
estynnid (conditional impersonal)
estynnid (imperfect impersonal indicative subjunctive)
estynnais (first-person preterite singular)
estynnaist (preterite second-person singular)
estynnodd (preterite singular third-person)
estynasom (first-person plural preterite)
estynasoch (plural preterite second-person)
estynasant (plural preterite third-person)
estynnwyd (impersonal preterite)
estynaswn (first-person pluperfect singular)
estynasit (pluperfect second-person singular)
estynasai (pluperfect singular third-person)
estynasem (first-person pluperfect plural)
estynasech (pluperfect plural second-person)
estynasent (pluperfect plural third-person)
estynasid (impersonal pluperfect)
estynesid (impersonal pluperfect)
estynnwyf (first-person present singular subjunctive)
estynnych (present second-person singular subjunctive)
estynno (present singular subjunctive third-person)
estynnom (first-person plural present subjunctive)
estynnoch (plural present second-person subjunctive)
estynnont (plural present subjunctive third-person)
estynner (impersonal present subjunctive)
estyn (imperative second-person singular)
estynna (imperative second-person singular)
estynned (imperative singular third-person)
estynnwn (first-person imperative plural)
estynnwch (imperative plural second-person)
estynnent (imperative plural third-person)
estynner (imperative impersonal)
estyn (noun-from-verb)
estynedig (participle)
estynadwy (participle)
estynna i (first-person future singular)
estynnaf i (first-person future singular)
estynni di (future second-person singular)
estynnith o (future singular third-person)
e (future singular third-person)
hi (future singular third-person)
estynniff e (future singular third-person)
estynnwn ni (first-person future plural)
estynnwch chi (future plural second-person)
estynnan nhw (future plural third-person)
estynnwn i (conditional first-person singular)
estynswn i (conditional first-person singular)
estynnet ti (conditional second-person singular)
estynset ti (conditional second-person singular)
estynnai fo (conditional singular third-person)
fe (conditional singular third-person)
hi (conditional singular third-person)
estynsai fo (conditional singular third-person)
estynnen ni (conditional first-person plural)
estynsen ni (conditional first-person plural)
estynnech chi (conditional plural second-person)
estynsech chi (conditional plural second-person)
estynnen nhw (conditional plural third-person)
estynsen nhw (conditional plural third-person)
estynnais i (first-person preterite singular)
estynnes i (first-person preterite singular)
estynnaist ti (preterite second-person singular)
estynnest ti (preterite second-person singular)
estynnodd o (preterite singular third-person)
e (preterite singular third-person)
hi (preterite singular third-person)
estynnon ni (first-person plural preterite)
estynnoch chi (plural preterite second-person)
estynnon nhw (plural preterite third-person)
estynna (imperative second-person singular)
estynnwch (imperative plural second-person)
estyn (mutation mutation-radical)
hestyn (mutation prothesis-h)

From Latin extendō (“to extend, to stretch, to enlarge”).

bor

(geography) (of an ice sheet) to advance


cyffin

cy-noun

cyffin f (plural cyffiniau or cyffinydd)

cyffiniau (plural)
cyffinydd (plural)
cyffin (mutation mutation-radical)
gyffin (mutation mutation-soft)
nghyffin (mutation mutation-nasal)
chyffin (mutation mutation-aspirate)


echdoriad

echdoriadau (plural)
echdoriad (mutation mutation-radical)
hechdoriad (mutation prothesis-h)


echdorri

cy-verb

echdorri (first-person singular present exdorraf)

exdorraf (first-person present singular)
echdorraf (first-person future indicative present singular)
echdorri (future indicative present second-person singular)
echdorra (future indicative present singular third-person)
echdorrwn (first-person future indicative plural present)
echdorrwch (future indicative plural present second-person)
echdorrant (future indicative plural present third-person)
echdorrir (future impersonal indicative present)
echdorrwn (conditional first-person singular)
echdorrwn (first-person imperfect indicative singular subjunctive)
echdorrit (conditional second-person singular)
echdorrit (imperfect indicative second-person singular subjunctive)
echdorrai (conditional singular third-person)
echdorrai (imperfect indicative singular subjunctive third-person)
echdorrem (conditional first-person plural)
echdorrem (first-person imperfect indicative plural subjunctive)
echdorrech (conditional plural second-person)
echdorrech (imperfect indicative plural second-person subjunctive)
echdorrent (conditional plural third-person)
echdorrent (imperfect indicative plural subjunctive third-person)
echdorrid (conditional impersonal)
echdorrid (imperfect impersonal indicative subjunctive)
echdorrais (first-person preterite singular)
echdorraist (preterite second-person singular)
echdorrodd (preterite singular third-person)
echdorasom (first-person plural preterite)
echdorasoch (plural preterite second-person)
echdorasant (plural preterite third-person)
echdorrwyd (impersonal preterite)
echdoraswn (first-person pluperfect singular)
echdorasit (pluperfect second-person singular)
echdorasai (pluperfect singular third-person)
echdorasem (first-person pluperfect plural)
echdorasech (pluperfect plural second-person)
echdorasent (pluperfect plural third-person)
echdorasid (impersonal pluperfect)
echdoresid (impersonal pluperfect)
echdorrwyf (first-person present singular subjunctive)
echdorrych (present second-person singular subjunctive)
echdorro (present singular subjunctive third-person)
echdorrom (first-person plural present subjunctive)
echdorroch (plural present second-person subjunctive)
echdorront (plural present subjunctive third-person)
echdorrer (impersonal present subjunctive)
echdorra (imperative second-person singular)
echdorred (imperative singular third-person)
echdorrwn (first-person imperative plural)
echdorrwch (imperative plural second-person)
echdorrent (imperative plural third-person)
echdorrer (imperative impersonal)
echdorri (noun-from-verb)
echdoredig (participle)
echdoradwy (participle)
echdorra i (first-person future singular)
echdorraf i (first-person future singular)
echdorri di (future second-person singular)
echdorrith o (future singular third-person)
e (future singular third-person)
hi (future singular third-person)
echdorriff e (future singular third-person)
echdorrwn ni (first-person future plural)
echdorrwch chi (future plural second-person)
echdorran nhw (future plural third-person)
echdorrwn i (conditional first-person singular)
echdorrswn i (conditional first-person singular)
echdorret ti (conditional second-person singular)
echdorrset ti (conditional second-person singular)
echdorrai fo (conditional singular third-person)
fe (conditional singular third-person)
hi (conditional singular third-person)
echdorrsai fo (conditional singular third-person)
echdorren ni (conditional first-person plural)
echdorrsen ni (conditional first-person plural)
echdorrech chi (conditional plural second-person)
echdorrsech chi (conditional plural second-person)
echdorren nhw (conditional plural third-person)
echdorrsen nhw (conditional plural third-person)
echdorrais i (first-person preterite singular)
echdorres i (first-person preterite singular)
echdorraist ti (preterite second-person singular)
echdorrest ti (preterite second-person singular)
echdorrodd o (preterite singular third-person)
e (preterite singular third-person)
hi (preterite singular third-person)
echdorron ni (first-person plural preterite)
echdorroch chi (plural preterite second-person)
echdorron nhw (plural preterite third-person)
echdorra (imperative second-person singular)
echdorrwch (imperative plural second-person)
echdorri (mutation mutation-radical)
hechdorri (mutation prothesis-h)

From ech- (“out-, ex-”) + torri (“to cut”).


dyddodiad

dyddodiadau (plural)
dyddodiad (mutation mutation-radical)
ddyddodiad (mutation mutation-soft)
nyddodiad (mutation mutation-nasal)

(chemistry, geography, countable) deposition


dyddodi

dyddodi (first-person singular present dyddodaf)

dyddodaf (first-person present singular)
dyddodaf (first-person future indicative present singular)
dyddodi (future indicative present second-person singular)
dyddoda (future indicative present singular third-person)
dyddodwn (first-person future indicative plural present)
dyddodwch (future indicative plural present second-person)
dyddodant (future indicative plural present third-person)
dyddodir (future impersonal indicative present)
dyddodwn (conditional first-person singular)
dyddodwn (first-person imperfect indicative singular subjunctive)
dyddodit (conditional second-person singular)
dyddodit (imperfect indicative second-person singular subjunctive)
dyddodai (conditional singular third-person)
dyddodai (imperfect indicative singular subjunctive third-person)
dyddodem (conditional first-person plural)
dyddodem (first-person imperfect indicative plural subjunctive)
dyddodech (conditional plural second-person)
dyddodech (imperfect indicative plural second-person subjunctive)
dyddodent (conditional plural third-person)
dyddodent (imperfect indicative plural subjunctive third-person)
dyddodid (conditional impersonal)
dyddodid (imperfect impersonal indicative subjunctive)
dyddodais (first-person preterite singular)
dyddodaist (preterite second-person singular)
dyddododd (preterite singular third-person)
dyddodasom (first-person plural preterite)
dyddodasoch (plural preterite second-person)
dyddodasant (plural preterite third-person)
dyddodwyd (impersonal preterite)
dyddodaswn (first-person pluperfect singular)
dyddodasit (pluperfect second-person singular)
dyddodasai (pluperfect singular third-person)
dyddodasem (first-person pluperfect plural)
dyddodasech (pluperfect plural second-person)
dyddodasent (pluperfect plural third-person)
dyddodasid (impersonal pluperfect)
dyddodesid (impersonal pluperfect)
dyddodwyf (first-person present singular subjunctive)
dyddodych (present second-person singular subjunctive)
dyddodo (present singular subjunctive third-person)
dyddodom (first-person plural present subjunctive)
dyddodoch (plural present second-person subjunctive)
dyddodont (plural present subjunctive third-person)
dyddoder (impersonal present subjunctive)
dyddoda (imperative second-person singular)
dyddoded (imperative singular third-person)
dyddodwn (first-person imperative plural)
dyddodwch (imperative plural second-person)
dyddodent (imperative plural third-person)
dyddoder (imperative impersonal)
dyddodi (noun-from-verb)
dyddodedig (participle)
dyddodadwy (participle)
dyddoda i (first-person future singular)
dyddodaf i (first-person future singular)
dyddodi di (future second-person singular)
dyddodith o (future singular third-person)
e (future singular third-person)
hi (future singular third-person)
dyddodiff e (future singular third-person)
dyddodwn ni (first-person future plural)
dyddodwch chi (future plural second-person)
dyddodan nhw (future plural third-person)
dyddodwn i (conditional first-person singular)
dyddodswn i (conditional first-person singular)
dyddodet ti (conditional second-person singular)
dyddodset ti (conditional second-person singular)
dyddodai fo (conditional singular third-person)
fe (conditional singular third-person)
hi (conditional singular third-person)
dyddodsai fo (conditional singular third-person)
dyddoden ni (conditional first-person plural)
dyddodsen ni (conditional first-person plural)
dyddodech chi (conditional plural second-person)
dyddodsech chi (conditional plural second-person)
dyddoden nhw (conditional plural third-person)
dyddodsen nhw (conditional plural third-person)
dyddodais i (first-person preterite singular)
dyddodes i (first-person preterite singular)
dyddodaist ti (preterite second-person singular)
dyddodest ti (preterite second-person singular)
dyddododd o (preterite singular third-person)
e (preterite singular third-person)
hi (preterite singular third-person)
dyddodon ni (first-person plural preterite)
dyddodoch chi (plural preterite second-person)
dyddodon nhw (plural preterite third-person)
dyddoda (imperative second-person singular)
dyddodwch (imperative plural second-person)
dyddodi (mutation mutation-radical)
ddyddodi (mutation mutation-soft)
nyddodi (mutation mutation-nasal)


gwaddod

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


gwaddodiad

gwaddodiadau (plural)
gwaddodiad (mutation mutation-radical)
waddodiad (mutation mutation-soft)
ngwaddodiad (mutation mutation-nasal)

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


dyddodyn

dyddodion (plural)
dyddodyn (mutation mutation-radical)
ddyddodyn (mutation mutation-soft)
nyddodyn (mutation mutation-nasal)

(geology, mostly plural) deposit, sediment


gwaddodi

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)
gwaddodedig (participle)
gwaddodadwy (participle)
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 (mutation mutation-radical)
waddodi (mutation mutation-soft)
ngwaddodi (mutation mutation-nasal)

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

af

(chemistry, geography) to deposit sediment, to precipitate


mewnlifol

cy-adj

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

mewnlifol (feminine singular)
mewnlifol (plural)
mor fewnlifol (equative)
mwy mewnlifol (comparative)
mwyaf mewnlifol (superlative)
mewnlifol (mutation mutation-radical)
fewnlifol (mutation mutation-soft)


ffenoleg

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

ffenoleg (feminine singular)
ffenoleg (plural)


diffeithdir

diffeithdiroedd (plural)
diffeithdir (mutation mutation-radical)
ddiffeithdir (mutation mutation-soft)
niffeithdir (mutation mutation-nasal)

From diffaith (“desolate, barren”) + tir (“land”).


hydred

hydredau (plural)
hydred (mutation mutation-radical)


lledred

cy-noun

lledred m (plural lledredau or lledredion)

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


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)