Where does “ascertainability” come from?

ascertainability (English) comes from English ascertainable, from English ascertain, from Middle English acerteynen, from Old French acertener, from Old French certain, from Vulgar Latin certanus, from Latin certus, from Proto-Indo-European krey- — to sift, separate, divide.

ascertainability (English): The quality of being ascertainable

Definitions

  1. The quality of being ascertainable

Ancestry of “ascertainability”, step by step

ascertainability traces back through two separate lines of ancestry.

via English ascertainable

StepLanguageWordMeaning
1EnglishascertainableAble to be ascertained
2EnglishascertainTo find out definitely; to discover or establish;...
3Middle Englishacerteynen
4Old Frenchacertenerto assure; to make sure of, to make certain of
5Old Frenchcertaincertain; sure
6Vulgar Latincertanuscertain
7Latincertuscertain; fixed, settled, firm; resolved,...
8Proto-Indo-Europeankrey-to sift, separate, divide

via English ity

StepLanguageWordMeaning
1Englishity
2Ingrian-uUsed to form nouns from verbs
Every word from Proto-Indo-European krey-Every word from Latin certusEvery word from Vulgar Latin certanus