Where does “nonunity” come from?

nonunity (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.

nonunity (English): Not of or pertaining to unity; Lack of unity;...

Definitions

  1. Not of or pertaining to unity; Lack of unity;...

Ancestry of “nonunity”, step by step

nonunity traces back through two separate lines of ancestry.

via English non

StepLanguageWordMeaning
1EnglishnonObsolete form of none
2Frenchnonno; not; a no, a negative response
3Old Frenchnonno; not; Alternative form of nom
4Latinnōnnot
5Old Latinnoenum
6Proto-Indo-Europeanóynosone; single

via English unity

StepLanguageWordMeaning
1EnglishunityOneness; the state or fact of being one undivided...
2Middle Englishunite
Every word from Proto-Indo-European óynos