Where does “nonequal” come from?

nonequal (English) comes from English non, from French non, from Old French non, from Latin nōn, from Old Latin noenum, from Proto-Indo-European óynos — one; single.

nonequal (English): Not equal; unequal, different; One who is not an...

Definitions

Not equal; unequal, different; One who is not an...

Ancestry of “nonequal”, step by step

nonequal traces back through two separate lines of ancestry.

via English non

Step	Language	Word	Meaning
1	English	non	Obsolete form of none
2	French	non	no; not; a no, a negative response
3	Old French	non	no; not; Alternative form of nom
4	Latin	nōn	not
5	Old Latin	noenum	—
6	Proto-Indo-European	óynos	one; single

via English equal

Step	Language	Word	Meaning
1	English	equal	The same in all respects; Exactly identical,...
2	Latin	aequālis	equal, like
3	Latin	æquus	equal
4	Latin	vocāre	—
5	Proto-Indo-European	wekʷ-	to speak, to sound out

Every word from Proto-Indo-European óynos →Every word from Old Latin noenum →Every word from Latin nōn →