Where does “acerteynen” come from?

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

Ancestry of “acerteynen”, step by step

StepLanguageWordMeaning
1Old Frenchacertenerto assure; to make sure of, to make certain of
2Old Frenchcertaincertain; sure
3Vulgar Latincertanuscertain
4Latincertuscertain; fixed, settled, firm; resolved,...
5Proto-Indo-Europeankrey-to sift, separate, divide

Words derived from “acerteynen”

Every word from Proto-Indo-European krey- →Every word from Latin certus →Every word from Vulgar Latin certanus →