Where does “uninfallible” come from?

uninfallible (English) comes from English infallible, from Medieval Latin īnfallibilis, from Latin īn-, from Latin în, from Latin en, from Proto-Italic en, from Proto-Indo-European h₁én — in.

uninfallible (English): Not infallible

Definitions

  1. Not infallible

Ancestry of “uninfallible”, step by step

uninfallible traces back through two separate lines of ancestry.

via English infallible

StepLanguageWordMeaning
1EnglishinfallibleWithout fault or weakness; incapable of error or...
2Medieval Latinīnfallibilis
3Latinīn-un-, non-, not
4Latinînin, at, on, upon, from (space)
5Latinenlookǃ beholdǃ; reallyǃ?; come onǃ
6Proto-Italicenin
7Proto-Indo-Europeanh₁énin

via English un

StepLanguageWordMeaning
1EnglishunOne
Every word from Proto-Indo-European h₁énEvery word from Latin īn-Every word from Proto-Italic en