Where does “ἑτερόκλιτος” come from?

ἑτερόκλιτος (Ancient Greek) comes from Ancient Greek κλίνω, from Proto-Indo-European ḱley-, from Proto-Indo-European ḱel- — to cover; to incline.

Ancestry of “ἑτερόκλιτος”, step by step

Step	Language	Word	Meaning
1	Ancient Greek	κλίνω	to bend, slant; to cause to give way, cause to...
2	Proto-Indo-European	ḱley-	to shelter, cover; to lean, slope, incline
3	Proto-Indo-European	ḱel-	to cover; to incline

ἑτερόκλιτος — Etymology, Origin & Word History | Etymology Explorer