いもせ 妹背 LinksSentence search for 妹背Sentence search for いもせSentence search for 妹兄Kanji details for 妹 and 背Edit in JMdict Noun1. couple; husband and wife; man and wifeArchaicNoun2. sibling; brother and sisterArchaicOther forms妹兄 【いもせ】 Discussions Log in to talk about this word.