Where does “kl(e)inō” come from?

kl(e)inō (Proto-Italic) comes from Proto-Indo-European ḱley-, from Proto-Indo-European ḱel- — to cover; to incline.

Ancestry of “kl(e)inō”, step by step

Step	Language	Word	Meaning
1	Proto-Indo-European	ḱley-	to shelter, cover; to lean, slope, incline
2	Proto-Indo-European	ḱel-	to cover; to incline

kl(e)inō — Etymology, Origin & Word History | Etymology Explorer