Noise that might accompany eructation here in Pompeii (3)
I believe the answer is:
hic
If this is the answer, I'm afraid I cannot explain it.
Can you help me to learn more?
(Other definitions for hic that I've seen before include "Sound of involuntary diaphragm contraction" , "Sound of inebriation" , "Noise of involuntary diaphragh spasm" , "here in Rome" , "In Latin, here and now - ? et nunc" .)