bí, biadh, bhias
Definitions (by source)
be. Pres. indic. 3rd sing. rel., (t)tás, 307 n., 1511 n. ; beithir, 4613 n. ; a mbídh, 6312 n.
Leabhar Branach: The Book of the O'Byrnes. Editor: Seán Mac Airt.
Leabhar Branach: The Book of the O'Byrnes. Editor: Seán Mac Airt.