Where does “nonunderstanding” come from?

nonunderstanding (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.

nonunderstanding (English): Absence of understanding or comprehension

Definitions

  1. Absence of understanding or comprehension

Ancestry of “nonunderstanding”, step by step

nonunderstanding 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 understanding

StepLanguageWordMeaning
1EnglishunderstandingThe act of one that understands or comprehends;...
2Old Englishunderstandanto understand
3Proto-Germanicunderstandanąto stand between, stand in the midst, understand
4Proto-Germanicunderamong, between; under, beneath; under
5Proto-Indo-Europeanh₁entérbetween
6Proto-Indo-Europeanh₁enin; in, inside
Every word from Proto-Indo-European óynos