authenticate

authenticate

verb

Definition of AUTHENTICATE

1

to declare (something) to be true or genuine <a jeweler authenticated the diamond as real>

Synonyms attest, authenticate, avouch, testify (to), vouch (for), witness

Related Words guarantee, warrant; affirm, assert, aver, avow, profess, vow

2

to give evidence or testimony to the truth or factualness of <we require more than simply your word to authenticate this story>

Synonyms argue, attest, authenticate, bear out, certify, corroborate, substantiate, support, validate, verify, vindicate

Related Words avouch, back (up), testify (to), vouch (for), witness; guarantee, warrant; affirm, assert, aver, avow, declare, profess; demonstrate, document, establish, prove, reinforce (also reenforce)

Near Antonyms contradict, gainsay; deny, disavow, disclaim; challenge, contest, dispute, question

Antonyms disprove, rebut, refute