Where does “nonvertex” come from?

nonvertex (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.

nonvertex (English): Not of or pertaining to the vertex

Definitions

  1. Not of or pertaining to the vertex

Ancestry of “nonvertex”, step by step

nonvertex 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 vertex

StepLanguageWordMeaning
1EnglishvertexThe highest point of something; The highest...
2Latinvertexwhirlpool, eddy, vortex; crown; top, peak, summit
3Latinvertōto turn, turn oneself, direct one's way, to turn about, turn around, revolve
4Proto-Italicwertōto turn
5Proto-Indo-Europeanwert-to turn, to rotate
6Proto-Indo-Europeanwer-to burn; to cover, heed, notice; squirrel
Every word from Proto-Indo-European óynos