authenticate

• (Received Pronunciation) IPA^(key): /ɒˈθɛn.tɪ.keɪt/

• Audio (Southern England):

  (file)

• (General American) IPA^(key): /ɔˈθɛn.tɪ.keɪt/
• (cot–caught merger) IPA^(key): /ɑˈθɛn.tɪ.keɪt/

From authentic +‎ -ate (verb-forming suffix).

authenticate (third-person singular simple present authenticates, present participle authenticating, simple past and past participle authenticated)

1. (transitive) To render authentic; to give authority to, by the proof, attestation, or formalities required by law, or sufficient to entitle to credit.
2. (transitive) To prove authentic; to determine as real and true.

   He didn’t manage to authenticate the portrait: it’s probably a fake.

   The server could not authenticate the request.

• authentify (which is a less common synonym)

• identify

• authentification

From authentic +‎ -ate (adjective-forming suffix)

authenticate (comparative more authenticate, superlative most authenticate)

1. Synonym of authentic.

• “authenticate”, in Webster’s Revised Unabridged Dictionary, Springfield, Mass.: G. & C. Merriam, 1913, →OCLC.