He made a blunder. 그는 어리석은 실수를 했어. / 영어 표현

He made a blunder.
그는 어리석은 실수를 했어.

blunder = 어리석은 실수
A blunder is a stupid or careless mistake.

make a blunder

A : She made a blunder on the show earlier this week.
그녀는 이번 주 초에 방송에서 어리석게 실수했어.
B : Stop banging on about it. None of your business.
그 일에 대해 그만 좀 말해. 네 일이나 신경 써.

* bang on about
: ~에 대해 오랜 시간 쉴 새 없이 떠들다

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Example sentences
As a result, those who make a blunder may have to go to court and incur legal costs to recover their money,
unless the recipient agrees to hand it back.
Times, Sunday Times

He had jumped nicely and was throwing down a challenge
when making a blunder two from home.
The Sun

But he managed the 45-minute session without making any blunders.
The Sun

He was never jumping well, made a blunder at the fourth-last fence,
and then gave his jockey absolutely no chance of staying on board at the third-last.
The Sun

Opposition leaders accused him of arrogance and making a blunder
that revealed his inexperience in leadership.
Times, Sunday Times