妹いもうとさんいもうとさんMeanings1nounyounger sister (honorific)honorific or respectful (sonkeigo)Polite term used to refer to someone else's younger sister. Not used for one's own sister.妹いもうとさんはお元げん気きですか。How is your younger sister?妹いもうとさんは大だい学がく生せいだそうですね。I hear your younger sister is a university student.
