頓着とんちゃく Noun Irregular Intransitive English jmdict 1 noun (common) (futsuumeishi) noun or participle which takes the aux. verb suru intransitive verb being concerned about or mindful of
頓着ないとんじゃくない adjective (keiyoushi) English jmdict 1 adjective (keiyoushi) indifferent;unconcerned Other forms 頓着無い 【とんじゃくない】