Where does “ḱeyw-” come from?

ḱeyw- (Proto-Indo-European) comes from Proto-Indo-European ḱey- — to be lying down; to settle.

Ancestry of “ḱeyw-”, step by step

Step	Language	Word	Meaning
1	Proto-Indo-European	ḱey-	to be lying down; to settle

ḱeyw- — Etymology, Origin & Word History | Etymology Explorer