From Middle English certeyn, certein, certain, borrowed from Old French certain, from a Vulgar Latin unattested form *certānus, extended form of Latin certus ("fixed, resolved, certain"), of the same origin as cretus, past participle of cernere. Displaced native Middle English wis, iwis (from Old English ġewiss ("certain, sure")) and alternative Middle English spelling sertane
Modern English dictionary
Explore and search massive catalog of over 900,000 word meanings.
Word of the Day
Get a curated memorable word every day.
Level up your vocabulary by setting personal goals.