彼は服装に無頓着で、いつも同じ上着を着ている。
He is indifferent to what he wears and always has the same jacket on.
弟はお金に無頓着なので、給料日前になるといつも困っている。
My younger brother is careless about money, so he is always in trouble just before payday.
彼女は他人の評判には無頓着な人だ。
She is someone who doesn't care what others say about her.
健康に対する無頓着が、後になって大きな病気を招いた。
His unconcern about his health later led to a serious illness.