퍽

1. out loud
A word imitating the sound made when one yells suddenly and strongly, or describing such a scene.

2. with a thump
A word imitating the sound made when one suddenly falls down backwards or falls flat on one's face, or describing such a scene.

3. deeply
A word imitating the sound made when one steps on and sinks deeply in mud, or describing such a scene.

4. suddenly; in a flash
A word imitating the sound made when gas suddenly catches fire.

5. bang
A word imitating the sound made when something bursts, not that strongly.