姉妹しまい Common Noun English jmdict 1 noun (common) (futsuumeishi) sisters 彼の姉妹は二人とも美人です。 Both his sisters are beautiful.
姉妹編しまいへん Noun English jmdict 1 noun (common) (futsuumeishi) companion (sister) volume (to);sequel (to) 彼は小説の姉妹編を執筆中だ。 He is now writing a sister volume to his novel.