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안 되는데

shouldn't; can't

→ 안
phrase Uncommon #6,123
shouldn't; can't A colloquial form of 안 되다 with -는데. It can express that something must not happen, is not possible, or does not work, often with a sense of concern, surprise, or contrast. As a sentence ending, it may imply “but...” or invite a response.
KO: 이러면 안 되는데.
EN: This shouldn't be happening.

형편이 안 되는데 어떡해요

I can't afford it. What should I do?

— 무방비 도시 (1945)

왜 안 되는데, 이 새끼 야?

Why not, you little shit?

— 서부 전선 이상 없다 (2022)

그럼 안 되는데

But then that won’t work.

— 추락의 해부 (2023)

이러면 안 되는데 받으세요

I shouldn't be doing this, but here, take it.

— 동경 이야기 (1953)

왜 안 되는데?

Why doesn't it work?

— 친절한 금자씨 (2005)

기자가 이렇게 편한 곳에 있으면 안 되는데 네?

Journalists aren’t supposed to be somewhere this comfortable, are they?

— 택시운전사 (2017)