Basic Examples:
* You must authenticate your account with a password before accessing the website.
* The security system uses facial recognition to authenticate users.
* The document was authenticated by a notary public.
More Complex Examples:
* The company implemented a two-factor authentication system to authenticate user logins and prevent unauthorized access.
* The museum's curator authenticated the ancient artifact as a genuine Roman coin.
* The digital signature on the email authenticated the sender's identity.
Sentence with Different Meaning:
* The author's style authenticates her writing as a genuine expression of her own thoughts and feelings.
You can also use "authenticate" as a verb in the past tense (authenticated) or present participle (authenticating):
* The document was authenticated by an expert.
* The system is currently authenticating your login credentials.