Where does “nonfallible” come from?

nonfallible (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.

nonfallible (English): Not fallible

Definitions

  1. Not fallible

Ancestry of “nonfallible”, step by step

nonfallible 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 fallible

StepLanguageWordMeaning
1EnglishfallibleCapable of making mistakes or being wrong
2Middle Englishfallible
3Medieval Latinfallibilisliable to err, also deceitful; Liable to error;...
4Latinfallēre
Every word from Proto-Indo-European óynos