Where does “unimprovability” come from?

unimprovability (English) comes from English improvability, from English ability, from Middle English abilite, from Old French ableté, from Latin habilitās, from Latin habilis, from Latin -ilis, from Proto-Italic -elis — Forms agent nouns from verbal roots.

unimprovability (English): The condition of being unimprovable

Definitions

  1. The condition of being unimprovable

Ancestry of “unimprovability”, step by step

unimprovability traces back through two separate lines of ancestry.

via English improvability

StepLanguageWordMeaning
1EnglishimprovabilityThe condition of being improvable
2EnglishabilitySuitableness; The quality or state of being able;...
3Middle Englishabilitesuitability, aptitude, ability
4Old Frenchableté
5Latinhabilitāsability, aptitude, fitness
6Latinhabilisable to have/possess/maintain; having sufficient...
7Latin-ilis-ile
8Proto-Italic-elis
9Proto-Indo-European-elis
10Proto-Indo-European-lósForms agent nouns from verbal roots

via English un

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