men

menni (plural)
mennau (plural)
men (mutation mutation-radical)
fen (mutation mutation-soft)

Variant of earlier ben, from Proto-Celtic *bend(n)ā (whence Latin benna), from Proto-Indo-European *bʰendʰ- (“to bind”).


both

bothau (plural)
both (mutation mutation-radical)
foth (mutation mutation-soft)
moth (mutation mutation-nasal)

Probably ultimately from Proto-Celtic *buzdos (“tail, penis”) perhaps from Proto-Indo-European *gʷosdʰos (“piece of wood”) (compare Proto-Slavic *gvozdь (“nail, tack, peg”)). Cognates include Cornish both (“hump, stud”), Breton bod (“bush, shrub”), Irish bod (“penis”), Manx bod (“penis”) and Manx bwoid (“penis”).


ben

benni (plural)
ben (mutation mutation-radical)
fen (mutation mutation-soft)
men (mutation mutation-nasal)

From Middle Welsh benn, from Proto-Brythonic *benn, from Proto-Celtic *bend(n)ā (whence Latin benna), from Proto-Indo-European *bʰendʰ- (“to bind”).


mast

cy-noun

mast m (plural mastiau or mestys or mestydd)

mastiau (plural)
mestys (plural)
mestydd (plural)


bord

bordydd (plural)
bord (mutation mutation-radical)
ford (mutation mutation-soft)
mord (mutation mutation-nasal)

From Middle Welsh bort, from Old English bord (“board”); doublet of bwrdd.


cil

cil (mutation mutation-radical)
gil (mutation mutation-soft)
nghil (mutation mutation-nasal)
chil (mutation mutation-aspirate)


gali

galïau (plural)
galis (plural)
gali (mutation mutation-radical)
ali (mutation mutation-soft)
ngali (mutation mutation-nasal)

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

(nautical, historical) galley (long low boat propelled by oars)


bwrdd

bwrdd m (plural byrddau or bwrddoedd or byrdd)

byrddau (plural)
bwrddoedd (plural)
byrdd (plural)
bwrdd (mutation mutation-radical)
fwrdd (mutation mutation-soft)
mwrdd (mutation mutation-nasal)

From Middle Welsh bwrt, from Old English bord (compare Irish bord); doublet of bord.


cist

cistiau (plural)
cist (mutation mutation-radical)
gist (mutation mutation-soft)
nghist (mutation mutation-nasal)
chist (mutation mutation-aspirate)

From Old English cist or Middle English kist.


starn

starn f or m (plural starnau, not mutable)

starnau (plural)
starn (mutation mutation-radical)


gwennol

gwenoliaid (plural)
gwennol (mutation mutation-radical)
wennol (mutation mutation-soft)
ngwennol (mutation mutation-nasal)

From Middle Welsh gwennawl, from Proto-Brythonic *gwennọl (compare Breton gwennel), from Proto-Celtic *wesnālā (whence Old Irish fannall). For sense "frog (in a horse's foot)", compare Ancient Greek χελιδών (khelidṓn).

bws gwennol


llestr

llestri (plural)
llestr (mutation mutation-radical)
lestr (mutation mutation-soft)

From Proto-Brythonic *llestr, from Proto-Celtic *lestrom (“pot”), possibly from Proto-Indo-European *les- (“to gather”) + *-trom. Compare Irish leastar (“cup, vessel, tub”), Breton lestr (“vessel, vase, ship”).

vessel, container
(nautical) boat, ship, watercraft

vessel, container
boat, ship, watercraft


cilbren

cilbrennau (plural)
cilbren (mutation mutation-radical)
gilbren (mutation mutation-soft)
nghilbren (mutation mutation-nasal)
chilbren (mutation mutation-aspirate)


hwylbren

hwylbren m or f (plural hwylbrenni or hwylbrennau, not mutable)

hwylbrenni (plural)
hwylbrennau (plural)


gwerin

gwerinoedd (plural)
gwerin (mutation mutation-radical)
werin (mutation mutation-soft)
ngwerin (mutation mutation-nasal)

From Proto-Brythonic *gwörin (compare Old Breton guerin glossing Latin factiō, Middle Breton gueryn (“people”)), from Proto-Celtic *worīnā (compare Old Irish foirenn glossing factiō, modern Irish foireann (“staff, team”)).


sliper

sliper m or f (plural slipers or sliperi or sliperau, diminutive slipren, not mutable)

slipers (plural)
sliperi (plural)
sliperau (plural)
slipren (diminutive)

(rail transport) railway sleeper, railroad tie


blaenoriaeth

blaenoriaethau (plural)
blaenoriaeth (mutation mutation-radical)
flaenoriaeth (mutation mutation-soft)
mlaenoriaeth (mutation mutation-nasal)


bŵt

bwtiau (plural)
bŵt (mutation mutation-radical)
fŵt (mutation mutation-soft)
mŵt (mutation mutation-nasal)


moryn

morynnau (plural)
morynnod (plural)
moryn (mutation mutation-radical)
foryn (mutation mutation-soft)

Mae'r morynnau yn hyrddio eu hunain wrth yr arfordir.

The breakers are battering against the coast.


dyfnder

dyfnder m (plural dyfnderau or dyfnderoedd)

dyfnderau (plural)
dyfnderoedd (plural)
dyfnder (mutation mutation-radical)
ddyfnder (mutation mutation-soft)
nyfnder (mutation mutation-nasal)


trawst

trawstiau (plural)
trawst (mutation mutation-radical)
drawst (mutation mutation-soft)
nhrawst (mutation mutation-nasal)
thrawst (mutation mutation-aspirate)


cyfnewidfa

cyfnewidfeydd (plural)
cyfnewidfa (mutation mutation-radical)
gyfnewidfa (mutation mutation-soft)
nghyfnewidfa (mutation mutation-nasal)
chyfnewidfa (mutation mutation-aspirate)

From cyfnewid (“to change, to exchange”) + -fa (“place”).

af

Cyfnewidfa Aberhonddu


sgrin wynt

cy-noun

sgrin wynt f (plural sgriniau gwynt, not mutable)


trofwrdd

trofwrdd m (plural trofyrddau or trofwrddoedd)

trofyrddau (plural)
trofwrddoedd (plural)
trofwrdd (mutation mutation-radical)
drofwrdd (mutation mutation-soft)
nhrofwrdd (mutation mutation-nasal)
throfwrdd (mutation mutation-aspirate)

From tro (“turn”) + bwrdd (“board”) (fwrdd is the soft mutation of bwrdd).


bogail

bogail m or f (plural bogeiliau or bogelau)

bogeiliau (plural)
bogelau (plural)
bogail (mutation mutation-radical)
fogail (mutation mutation-soft)
mogail (mutation mutation-nasal)


celsan

celsan (mutation mutation-radical)
gelsan (mutation mutation-soft)
nghelsan (mutation mutation-nasal)
chelsan (mutation mutation-aspirate)


celbren

celbrennau (plural)
celbren (mutation mutation-radical)
gelbren (mutation mutation-soft)
nghelbren (mutation mutation-nasal)
chelbren (mutation mutation-aspirate)


cêl

cêl (mutation mutation-radical)
gêl (mutation mutation-soft)
nghêl (mutation mutation-nasal)
chêl (mutation mutation-aspirate)


cyffordd

cyffyrdd (plural)
cyffordd (mutation mutation-radical)
gyffordd (mutation mutation-soft)
nghyffordd (mutation mutation-nasal)
chyffordd (mutation mutation-aspirate)

From cy- (“co-, con-”) + ffordd (“road”).

(road transport, rail transport) junction


gwagen

gwagenau (plural)
gwageni (plural)
gwagen (mutation mutation-radical)
wagen (mutation mutation-soft)
ngwagen (mutation mutation-nasal)

(transport) Alternative form of wagen (“wagon”)


plât rhifau

platiau rhifau (plural)
plât rhifau (mutation mutation-radical)
blât rhifau (mutation mutation-soft)
mhlât rhifau (mutation mutation-nasal)
phlât rhifau (mutation mutation-aspirate)


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.


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

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


llywle

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


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)