Where does “cālīgō” come from?

cālīgō (Latin) comes from Proto-Indo-European ḱel- — to cover; to incline.

Ancestry of “cālīgō”, step by step

Step	Language	Word	Meaning
1	Proto-Indo-European	ḱel-	to cover; to incline

cālīgō — Etymology, Origin & Word History | Etymology Explorer