亡妹 ぼうまい noun (common) (futsuumeishi) 亡妹ぼうまい Noun English JMdict 1 noun (common) (futsuumeishi) one's deceased younger sister 漢字 kanji used 亡 deceased, the late 3画 · JLPT N 2 妹 younger sister 8画 · JLPT N 3