妹婿 いもうとむこ noun (common) (futsuumeishi) 妹婿いもうとむこ Noun English JMdict 1 noun (common) (futsuumeishi) the husband of one's younger sister 漢字 kanji used 妹 younger sister 8画 · JLPT N 3 婿 bridegroom, son-in-law 12画 · JLPT N 1