What does these sentences mean?
1. 푹 쉬세요
2푹 자요
3. 푹 자야해
What does 푹 mean? When and how to use it in with a word?

Question

What does these sentences mean?
1. 푹 쉬세요 
2푹 자요
3. 푹 자야해
What does 푹 mean? When and how to use it in with a word?

Answer

푹 is an onomatopoeic adverb associated with "deep" and "long".
To Koreans, the sound of 푹, (or lengthened to 푸욱 sometimes) evokes something deep and long.
- 푹 자다:  sleep soundly (deep, long sleep with no interruption).
- 칼로 푹 찌르다:  stab deeply with a knife.
- 푹 과 [고아]:  deep-simmer it for a long time (to cook even the bones).  고다: simmer for a long time.

Answer

As far as I understand, it's similar to saying "sleep tight" in English.

Answer

It means like "sleep well bro" "get a good rest mate" When and how to use it If you say this word "푹" think in your mind opponent to imply

Answer

It means like "sleep well bro" "get a good rest mate"  
When and how to use it If you say this word "푹" think in your mind opponent to imply