Hiccup

Involuntary contraction of the diaphragm

A hiccup is an involuntary contraction of the diaphragm that may repeat several times per minute. The hiccup is an involuntary action involving a reflex arc. Once triggered, the reflex causes a strong contraction of the diaphragm followed about a quarter of a second later by closure of the vocal cords, which results in the "hic" sound.

This keyword could refer to multiple things. Here are some suggestions: