Vocabulary

愚か

foolish; stupid; silly

na-adjective
N1 freq #25

Example sentences

He knows better than to fight with his boss.

He blushed at his foolish mistake.

He blushed at his folly.

He was silly enough to believe her.

He knew better than to say such a thing.

He is not such a fool that he doesn't know it.

He is not at all foolish.

He thought how foolish he had been.