けいまい 兄妹 LinksSentence search for 兄妹Sentence search for けいまいSentence search for きょうだいKanji details for 兄 and 妹Edit in JMdict Noun1. older brother and younger sisterOther forms兄妹 【きょうだい】Notesきょうだい: Irregular kana usage. Discussions Log in to talk about this word.