亡ぼう妹まいぼうまいじ字FuriganaMeanings1noundeceased younger sisterFormal or literary term used to refer to one's own younger sister who has passed away. Not used in casual conversation; in everyday speech, a phrase like 亡くなった妹 is more common.亡ぼう妹まいの遺い品ひんを整せい理りしている。I am sorting through my deceased younger sister's belongings.