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Verb
- 1
shut; close
To shut one's mouth by putting one's upper and lower lips together.
Korean definition: 윗입술과 아랫입술을 붙여 입을 닫다.
Self-conscious about his protruding teeth, he often consciously keeps his mouth shut.
Nervous, I kept my mouth firmly shut and answered the interviewer's questions with a stiff expression.