Blöyn, n. blossom

Blwch, n. box

Blwng, n. angry look: a. surly

Blwth, n. a blast, a puff

Blwydd, n. a year; a budding

Blwyddiad, n. a yearling

Blwyddol, a. yearly, annual

Blwyddyn, n. a year

Blychaid, n. a box full

Blychu, v. to put in a box