Where does “moi-n-” come from?

moi-n- (Proto-Indo-European) comes from Proto-Indo-European mey- — to strengthen; to bind; to change, exchange.

Ancestry of “moi-n-”, step by step

Step	Language	Word	Meaning
1	Proto-Indo-European	mey-	to strengthen; to bind; to change, exchange

moi-n- — Etymology, Origin & Word History | Etymology Explorer