Where does “unfaultable” come from?

unfaultable (English) comes from English faultable, from English able, from Middle English able, from Old French able, from Latin habilis, from Latin -ilis, from Proto-Italic -elis, from Proto-Indo-European -elis — Forms agent nouns from verbal roots.

unfaultable (English): Not capable of being faulted; with which no fault...

Definitions

  1. Not capable of being faulted; with which no fault...

Ancestry of “unfaultable”, step by step

unfaultable traces back through two separate lines of ancestry.

via English faultable

StepLanguageWordMeaning
1EnglishfaultableCapable of being faulted, or found fault with;...
2EnglishableEasy to use; Suitable; competent; Liable to
3Middle Englishablecapable, expert, qualified, skilful, competent
4Old Frenchableable; capable
5Latinhabilisable to have/possess/maintain; having sufficient...
6Latin-ilis-ile
7Proto-Italic-elis
8Proto-Indo-European-elis
9Proto-Indo-European-lósForms agent nouns from verbal roots

via English un

StepLanguageWordMeaning
1EnglishunOne
Every word from Proto-Indo-European -lós