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ver·i·fy

verify

pronunciation:
ve r faI
part of speech: transitive verb
inflections: verified, verifies, verifying
definition: to confirm the truth or accuracy of; substantiate; confirm.
He told the police that he'd been walking in the park, but there was no one who could verify this.We need something like a driver's license to verify your identity.
synonyms:
authenticate, confirm, corroborate, establish, validate, vouch
antonyms:
refute
similar words:
attest, certify, check, document, double-check, prove, substantiate, sustain, testify, witness
derivations: verifiable (adj.), verifier (n.)