authenticate

1. 1

   To render authentic; to give authority to, by the proof, attestation, or formalities required by law, or sufficient to entitle to credit.transitive

2. 2

   To prove authentic; to determine as real and true.transitive

   • He didn’t manage to authenticate the portrait: it’s probably a fake.
   • The server could not authenticate the request.

syn. authentify

1. 1

   Synonym of authentic.