march

meirch (plural)
caseg (feminine)
march
farch (soft)

From Middle Welsh march, from Proto-Brythonic *marx, from Proto-Celtic *markos.


pig

Possibly from Middle English pyke (“pike, sharp point”). Cognate with Breton beg.

bor

(as y big) pip (a respiratory disease in birds such as coryza)


paun

peunod (plural)
peunes (feminine)
paun
baun (soft)
mhaun
phaun


menyw

Variant of benyw back-formed from the soft mutation fenyw.


menyw

cy-adj

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

menyw (feminine singular)
menyw (plural)
menyw
fenyw (soft)


sigarét

cy-noun

sigarét f (plural sigaréts or sigaretau, not mutable)


sigaren

sigaren f (plural sigarennau, not mutable)


tarw

teirw (plural)
tarw
darw (soft)
nharw
tharw

From Proto-Brythonic *tarw, from Proto-Celtic *tarwos, from Proto-Indo-European *táwros.


arthes

arthesau (plural)
arthes
harthes (prothesis-h)


ceiliog

ceiliog m (plural ceiliogod or ceiliogau)

ceiliogod (plural)
ceiliogau (plural)
ceiliog
geiliog (soft)
ngheiliog
cheiliog

From Middle Welsh keilyawc, from Proto-Brythonic *kėljọg, from Proto-Celtic *kalyākos, from Proto-Indo-European *kleh₁- (“call”).


ebol

ebolion (plural)
ebol
hebol (prothesis-h)

PIE word
 *h₁éḱwos
From Middle Welsh ebawl, from Proto-Brythonic *ebọl, diminutive of *eb (“horse”).


anner

aneirod (plural)
aneiri (plural)
anner
hanner (prothesis-h)

From Middle Welsh anneir, from Proto-Brythonic *anner, from Proto-Celtic *anderā (“young woman”), of uncertain etymology. Compare Cornish annor, Breton annoar (“heifer”), and Old Irish ainder (“maiden”).


iâr

From Middle Welsh yar, from Old Welsh iar, from Proto-Celtic *yarā (compare Cornish and Breton yar (“hen”), Middle Irish eirín, Irish eireog (“chicken”)).


cadair

cadeiriau (plural)
cadeirau (plural)
cadair
gadair (soft)
nghadair
chadair

From Middle Welsh cadeir, from Proto-Brythonic *kadėr (compare Cornish kador and Middle Breton cadoer), from Latin cathedra (compare Middle Irish cathaír), from Ancient Greek καθέδρα (kathédra).


cadnawes

cadnawes f (plural cadnawesau, masculine cadno)

cadnawesau (plural)
cadno (masculine)
cadnawes
gadnawes (soft)
nghadnawes
chadnawes

From cadno (“fox”) + -es (feminine suffix).


mollt

From Proto-Celtic *moltos (compare Old Irish molt, Breton maout (“ram”), Cornish mols, Gaulish multo).


llaid

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


cynffon

cynffon f (plural cynffonnau or cynffonion)

cynffonnau (plural)
cynffonion (plural)
cynffon
gynffon (soft)
nghynffon
chynffon

cynffonna

to wag the tail, to fawn, to suck up to (someone)


pwd

(veterinary medicine, with definite article) various diseases of livestock including:


caeriwrch

caeriwrch m (plural ceiryrch or ceiriyrch or caeriyrchod)

ceiryrch (plural)
ceiriyrch (plural)
caeriyrchod (plural)
caeriwrch
gaeriwrch (soft)
nghaeriwrch
chaeriwrch

From Middle Welsh kaeriwrch, from *caer (“sheep”) (from Proto-Celtic *kaɸrāxs) + iwrch (“roe deer, roebuck”).


piw

piwod (plural)
piwau (plural)
piw
biw (soft)
mhiw
phiw

If the original meaning was "something prominent or protuberant," possibly related to pìn (“peg, pin, point”).


radwla

radwla m or f (plural radwlâu, not mutable)

From English radula, from Latin rādula (“scraper”).


migwyn

Possibly from mign (“marsh, bog; bog moss”) + gwyn (“white”).


milfeddyg

milfeddygon (plural)
milfeddyg
filfeddyg (soft)

/mɪlˈvɛðɨ̞ɡ/

/mɪlˈveːðɪɡ/


eidion

eidionnau (plural)
eidion
heidion (prothesis-h)

beef, ox, steer, bullock (domestic male of the bovine family)


mwsogl

cy-noun

mwsogl m (plural mwsoglydd or mwsoglau or mwsoglion)

mwsoglydd (plural)
mwsoglau (plural)
mwsoglion (plural)
mwsogl
fwsogl (soft)


rhawn

rhawn m (collective, singulative rhawnyn)

rhawn f (collective, singulative rhawnen)

rhawnyn (singulative)
rhawnen (singulative)

Inherited from Proto-Brythonic *rrọn (“horsehair”), from Proto-Celtic *(ɸ)rānos (“mane”). Compare Irish rón (“long hair as from an animal's tail”), Middle Irish róinne, rúainne (“a single hair”).

cog

horsehair, bristles, long coarse animal hair


rhawn

cy-adj

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

rhawn (feminine singular)
rhawn (plural)


peunes

cy-noun

peunes f (plural peunesau, masculine paun)

peunesau (plural)
paun (masculine)
peunes
beunes (soft)
mheunes
pheunes


llwynoges

llwynoges f (plural llwynogesau, masculine llwynog)

llwynogesau (plural)
llwynog (masculine)
llwynoges
lwynoges (soft)

/ɬʊɨ̯ˈnɔɡɛs/

/ɬʊi̯ˈnoːɡɛs/

/ɬʊi̯ˈnɔɡɛs/

From llwynog (“fox”) + -es (feminine suffix).


llwg

possibly related to llwgu (“to starve”).

(veterinary medicine) foot rot in cows and sheep


sigâr

sigâr f (plural sigârs or sigarau, diminutive sigaren, not mutable)

sigârs (plural)
sigarau (plural)
sigaren (diminutive)

Borrowed from English cigar, from Spanish cigarro.


malltod

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

af

(veterinary medicine) liver rot, fascioliasis (in sheep)


cadnöes

cy-noun

cadnöes f (plural cadnoësau, masculine cadno)

cadnoësau (plural)
cadno (masculine)
cadnöes
gadnöes (soft)
nghadnöes
chadnöes

(South Wales) Alternative form of cadnawes (“vixen”)


mamwenyn

mamwenyn f (collective, singulative mamwenynen)

mamwenynen (singulative)
mamwenyn
famwenyn (soft)


modrydaf

modrydafau (plural)
modrydaf
fodrydaf (soft)

From *modr (“mother”) + bydaf (“swarm, nest of (wild) bees”)


cysb

(veterinary medicine) grass tetany, the staggers


cath wryw

cathod gwryw (plural)
cath wryw
gath wryw (soft)
nghath wryw
chath wryw


ysfa

cy-noun

ysfa f (plural ysfeydd or ysfaoedd or ysfeuon)

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

Alternative form of rhosfa (“sheep-walk”)