-갔-

Etymology
See the main entry. The vowel change to is irregular; Ko Gwang-mo believes it was potentially influenced by a putative suffix, which would have been the yang-vowel form of the etymologically unrelated Early Modern suffix.

Usage notes

 * Sometimes the synonymous suffix, the form used in Hwanghae, Pyong'an, and Yukjin, is also written as under influence from the standard orthography.