Where does “h₂en-ero-” come from?

h₂en-ero- (Proto-Indo-European) comes from Proto-Indo-European h₂en- — on, onto.

Ancestry of “h₂en-ero-”, step by step

Step	Language	Word	Meaning
1	Proto-Indo-European	h₂en-	on, onto

h₂en-ero- — Etymology, Origin & Word History | Etymology Explorer