1) 無頓着むとんちゃく Parts 無 頓着 #17,708 Inflections of 無頓着 Class Na-adjective Stem Inflected ending ✕ Link copied! むとんちゃく [2] Meaning Shirabe Na-adjective Noun indifferent; unconcerned; nonchalant; unmindful; inattentive; careless 次郎じろうは服ふくのことに無頓着むとんちゃくだ。 Jiro is indifferent about clothing. Kanji 無 ム nothingness, none, ain't 頓 トン suddenly, immediately, in a hurry 着 チャク don, arrive, wear Forms 無頓着#17,708無頓着むとんちゃくむとんじゃく#313,356むとんじゃくむとんちゃくむとんちゃく