confirm

1 to give evidence or testimony to the truth or factualness of several eyewitnesses who can confirm the defendant's account of what happened 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

2 to give official acceptance of as satisfactory the senate must confirm an appointment to an ambassadorship Synonyms accredit, approbate, authorize, clear, approve, finalize, formalize, homologate, OK (or okay), ratify, sanction, warrantRelated Words accept, acknowledge, affirm; certify, endorse (also indorse), validate; bless, canonize, sanctify; initial, rubber-stamp, sign, sign off (on); allow, enable, legalize, license (also licence), pass, permit; reapproveNear Antonyms ban, enjoin, forbid, illegalize, interdict, prohibit, proscribe; disregard, ignore, neglect, overlook; rebuff, rebut, refuse, spurnAntonyms decline, deny, disallow, disapprove, negative, reject, turn down, veto