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verify

[ver-uh-fahy]
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verb (used with object), ver·i·fied, ver·i·fy·ing.
  1. to prove the truth of, as by evidence or testimony; confirm; substantiate: Events verified his prediction.
  2. to ascertain the truth or correctness of, as by examination, research, or comparison: to verify a spelling.
  3. to act as ultimate proof or evidence of; serve to confirm.
  4. Law.
    1. to prove or confirm (an allegation).
    2. to state to be true, especially in legal use, formally or upon oath.
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Origin of verify

1275–1325; Middle English verifien < Middle French verifier < Medieval Latin vērificāre, equivalent to vēri-, combining form of vērus true + -ficāre -fy
Related formsver·i·fi·a·bil·i·ty, ver·i·fi·a·ble·ness, nounver·i·fi·a·ble, adjectivever·i·fi·er, nounnon·ver·i·fi·a·ble, adjectivepre·ver·i·fy, verb (used with object), pre·ver·i·fied, pre·ver·i·fy·ing.re·ver·i·fy, verb (used with object), re·ver·i·fied, re·ver·i·fy·ing.un·ver·i·fi·a·bil·i·ty, nounun·ver·i·fi·able, adjective

Synonyms

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2. authenticate, validate.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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British Dictionary definitions for unverifiable

verify

verb -fies, -fying or -fied (tr)
  1. to prove to be true; confirm; substantiate
  2. to check or determine the correctness or truth of by investigation, reference, etc
  3. law to add a verification to (a pleading); substantiate or confirm (an oath)
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Derived Formsverifiable, adjectiveverifiableness, nounverifiably, adverbverifier, noun

Word Origin

C14: from Old French verifier, from Medieval Latin vērificāre, from Latin vērus true + facere to make
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for unverifiable

verify

v.

early 14c., from Old French verifier, from Medieval Latin verificare "make true," from Latin verus "true" (see very) + root of facere "to make" (see factitious).

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Online Etymology Dictionary, © 2010 Douglas Harper