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입이 무겁다

ibi mugeopda
idiom★Intermediate
informal

To be tight-lipped; to keep a secret; to not talk much

그는 입이 무거워서 비밀을 잘 지킨다.

He is tight-lipped and keeps secrets well.

입이 무거운 친구에게 비밀을 털어놨다.

I confided in my tight-lipped friend.

💡

This idiom is often used to describe someone who doesn't talk much or keeps secrets well. It can be positive or neutral depending on context.

Collocations

입이 무거운 사람a tight-lipped person입이 무겁게in a tight-lipped manner

Synonyms

Antonyms

Related Phrases

입이 가벼운 사람phrase
a talkative person
입이 무겁게 다뤄야 할 문제phrase
a matter that must be handled discreetly

💡Pro Tip

Usage Context

This idiom is often used when praising someone's ability to keep secrets or when choosing someone to confide in.

⚡Gold Rule

Positive Connotation

Unlike '입이 가벼운 사람' (a talkative person), this phrase generally has a positive or neutral connotation.

📖Word Origin

The literal meaning is 'heavy mouth,' which metaphorically describes someone who doesn't speak much or keeps secrets.

📝Usage Notes

This expression is commonly used in everyday conversation to describe someone who is trustworthy with secrets or doesn't talk excessively.

Word Breakdown

입이
mouth
noun
+
무겁다
heavy
adjective
✎ Noted on May 31, 2026KO → EN

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