꾹

firmly; hard

Explanation

1. firmly; hard
In the manner of pressing down, gripping, or tightening very strongly.

2. patiently; stoically
In the manner of enduring or bearing very painfully.

3. completely
In the manner of hiding or not coming out of a place so as not to be seen.

Examples
눈을 꾹 감다
도장을 꾹 찍다
모자를 꾹 눌러 쓰다

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