Where does “clé” come from?

clé (Old Irish) comes from Proto-Celtic kliyos, from Proto-Indo-European ḱley-, from Proto-Indo-European ḱel- — to cover; to incline.

clé (Old Irish): left

Definitions

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

clé — Etymology, Origin & Word History | Etymology Explorer