(Greek authentikos > Latin authenticus: original, genuine, authoritative; one who does something himself or herself)
2. Etymology: from 1340, "authoritative", from Old French autentique, from Medieval Latin authenticus, from Greek authentikosl "original oe genuine."
Originally from Greek authentikos, it was a derivative of the noun authentes, "doer, master", which was formed from autos, "self" and the base -hentes, "worker, doer, being".
Before he could pick up his package at the post office, Jeffery had to authenticate that he was the authorized person by showing his driver’s license.2. To prove something to be genuine; especially, some artistic piece of work: The insurance company wanted Linda to have her violin's condition authenticated by a violin expert so it could be insured in case of theft, fire, etc.
2. Intended to deceive; counterfeit.
2. Not made certain by an authority.