CERTAIN

I. adjective Etymology: Middle English, from Anglo-French, from Vulgar Latin *certanus, from Latin certus, from past participle of cernere to sift, discern, decide; akin to Greek krinein to separate, decide, judge, Old Irish criathar sieve Date: 13th century fixed , settled , of a specific but unspecified character, quantity, or degree , 3. dependable , reliable , known or proved to be true ; indisputable , 4. inevitable , incapable of failing ; destined, assured in mind or action , see: sure II. pronoun, plural in construction Date: 15th century ~ ones