김치

Etymology
In most dialects, Middle Korean was regularly palatalized to, whence modern southern dialectal. However, southern Korean dialects also palatalized to, which the Seoul prestige dialect did not. Seoul speakers hence hypercorrected to  to avoid sounding "southern", whence modern Standard.

This word displaced the older term  (whence, now only used in compound words and the southwestern Jeolla dialect), probably because regular sound change rendered it monosyllabic and caused it to have a large number of homophones.

Noun

 * 1) kimchi, a dish made with fermented, seasoned vegetables

Interjection

 * 1) cheese said while being photographed