Mapun - ipa

Brother-in-law; sister-in-law.

He's my brother-in-law because he's married to my sister.

sipag-

(For people) to be in such a relationship.

Sipagipa kami ka si Amang.

Amang and I are brother-in-laws.

mag-

To refer to or address s.o. as a brother-in-law or sister-in-law.

bayaw