יָבַם yâbam (H2992)
to marry a (deceased) brother's widow
1) (Piel) to perform levirate marriage, perform the duty of a brother-in-law 1a) the duty due to a brother who died childless - to marry his widow and have a son for his name
a primitive root of doubtful meaning; used only as a denominative from יָבָם (H2993);