ḵ'iilk [ḵ'iilk]
intransitive verb. have heartburn
../mp3s/k_ul_hard/k'iilk-dl-hb-01.mp3 Ḵ'iilga'nu, g̱al 'wiileeksa ḵ'awtsii ga̱bu. I have heartburn, I had too much grease.

Source: Draft Dictionary entry.