멍청하다

stunned; numbed

Explanation

1. stunned; numbed
Dazed as if one lost one's wits.

2. stupid; foolish
So unintelligent as to be incapable of making sound judgements.

Examples
행동이 멍청하다
승규의 형은 똑똑한 데 반해 승규는 멍청하다

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