indiscreet(ly); thoughtless(ly); imprudent(ly)
- 無分別なことをする
- act indiscreetly [imprudently]
- 病人に向かってそんなことを言うとは無分別だ
- It was thoughtless [careless/inconsiderate] of you to say such a thing to a sick person.
- 無分別にも彼は嵐の中を漕ぎ出た
- He rashly rowed out in the storm.
- あんなスピードで混雑した街の中を運転するとは無分別にもほどがある
- How reckless of him to drive at such a speed in crowded streets!
- 秘密をしゃべるほど無分別ではあるまい
- Surely he knows better than to talk about our secret.