Where does “ratability” come from?

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

ratability (English): The quality or state of being ratable

Definitions

  1. The quality or state of being ratable

Ancestry of “ratability”, step by step

ratability traces back through two separate lines of ancestry.

via English ability

StepLanguageWordMeaning
1EnglishabilitySuitableness; The quality or state of being able;...
2Middle Englishabilitesuitability, aptitude, ability
3Old Frenchableté
4Latinhabilitāsability, aptitude, fitness
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 rate

StepLanguageWordMeaning
1EnglishrateThe worth of something; value; The proportional...
2Frenchratespleen; female equivalent of rat; female rat;...
3Frenchratrat; sweetheart; scrooch
4Middle Frenchratrat
5Old Frenchratrat rodent
6Old High Germanratorat
7Proto-Germanicratō
8Proto-Germanicrattazrat
9Proto-Indo-EuropeanHreh₃d-to scrape
Every word from Proto-Indo-European -lós
ratability — Etymology, Origin & Word History | Etymology Explorer