してい 姉弟 LinksSentence search for 姉弟Sentence search for していSentence search for きょうだいKanji details for 姉 and 弟Edit in JMdict Noun1. older sister and younger brotherOther forms姉弟 【きょうだい】Notesきょうだい: Irregular kana usage. Discussions Log in to talk about this word.