exceedingly; greatly; so

Explanation

1. exceedingly; greatly; so
Very much, enough to please one.

2. right away; immediately
Right now.

Examples
썩 마음에 들지는 않다
썩 잘하지는 못하다
시험 점수를 보니 기분이 썩 유쾌하지는 않다

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