Where does “խիթք” come from?

խիթք (Old Armenian) comes from Old Armenian խիթ, from Proto-Indo-European kh₂id-to-, from Proto-Indo-European kh₂eyd- — to cut, hew.

Ancestry of “խիթք”, step by step

Step	Language	Word	Meaning
1	Old Armenian	խիթ	pain, colic, twinge; rock, reef; crocodile
2	Proto-Indo-European	kh₂id-to-	—
3	Proto-Indo-European	kh₂eyd-	to cut, hew

խիթք — Etymology, Origin & Word History | Etymology Explorer