Where does “unfirable” come from?

unfirable (English) comes from English firable, 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.

unfirable (English): Incapable of being fired

Definitions

  1. Incapable of being fired

Ancestry of “unfirable”, step by step

unfirable traces back through two separate lines of ancestry.

via English firable

StepLanguageWordMeaning
1EnglishfirableCapable of being fired; For which one may be...
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 -lósEvery word from Latin -ilisEvery word from Latin habilis