Bwmbwl, bubble.
Bwn, the bittern.
Bwrdais, a burgess.
Bwrdd, a table, a board.
Bwrlwm, bubble; byrlymu, to bubble, gurgle.
Bwrn, an inclination to vomit.
Bwrw, to cast, to throw, to vomit; bwriad, an intent, or purpose; bwriadu, to intend, design, or purpose.
Bwth, a cottage.
Bwyaid, eucharist, mass.
Bwyall, bwyell, an axe, hatchet.
Bwyd, meat, victuals; bwyta, to eat; bwyllwrw, provision for a journey.
Bwygilydd, one to the other.
Bwys, hamper, basket.
Bwystfil, a wild beast; bwystgunion, wild beasts.
Bychan, little; bychydig, very little; bychanigyn, a very little thing; bychodedd, slender means; bychodrwydd, few.
Byd, the world; bydol, worldly.
Bydaf, a bee-hive; bydafu, to hive bees.
Bydwraig, a midwife.
Byddag, snare, noose, knot.
Byddar, deaf; byddaru, to wax deaf, or make deaf.
Byddin, an army; byddino, to exercise soldiers.
Bygwl, threatenings; bygylu, to threaten; bygwth, to threaten, threatening.
Bynnag, -soever.
Byrnio, to load.
Byrdon, the burden of a song.
Byrdd, byrddau, tables, boards.
Byrhwch, pry llwyd, pry penfrith, a gray brock, or badger.
Byrllysg, a sceptre, a rod.
Byrn, beirn, barnau, judgments.
Byrr, short; byrhau, to shorten.
Bys, a finger.
Bystwn, a whitlow.
Byth, for ever.
Byther, bydder, bydded, let it be.
Bytheiad, a hound.
Bytheirio, bretheirio, to belch.
Byw, to live, alive; bywiol, lively; bywiogrwydd, liveliness; bywyd, life, livelihood; i'r byw, to the quick.
Bywion, emmets, ants, pismires.
C
Caban, a cottage, a cabin of a ship.
Cabidwl, chapter, consistory, council-house; cabidyldy, a convocation-house, chapter-house.
Cabl, cabledd, blasphemy; cablu, to blaspheme; cablus, blasphemous.
Cablyd, dydd Iau Cablyd, Maundy or Shear Thursday.
Cabol, smooth; caboli, to smooth; cabolfaen, a smoothing-stone.
Cabrytai, boor, clown.
Caca, ordure.
Cacen, cake; loose woman.
Cacwn, wasps; cacynen, a wasp.
Câch, a turd, dung, excrements; cachad, a mad foolish doating fellow, slothful; cachadydd, cachgi, coward.
Câd, a war, battle, fight; cadeithi, wars; cadfa, the field or place where two armies fight; cad-farch, a war-like horse; cadgno, a sword; cadell, defence, army; cadeithi, qualities; cadgi, mastiff; cadgyffro, insurrection; cadlys, a garrison; cadofydd, strategist; cadorfod, conflict; catrawd, regiment.
Cadach, cader, clout, kerchief.
Cadair, cader, a chair; a strong, or fortified place.