brother-in-law
noun [ C ] uk/ˈbrʌð.ə.rɪn.lɔː/ us/ˈbrʌð.ɚ.ɪn.lɑː/ brothers-in-law
B2 大伯子；小叔子；内兄；内弟；姐夫；妹夫；连襟
the husband of your sister or brother, or the brother of your husband or wife, or the man who is married to the sister or brother of your wife or husband