unauthentic

adjective

un·​au·​then·​tic ˌən-ə-ˈthen-tik 

-ȯ-

: not real, accurate, or sincere : not authentic : inauthentic

an unauthentic document

unauthentic ingredients

unauthentically

ˌən-ə-ˈthen-ti-k(ə-)lē 

-ȯ-

adverb

unauthenticity

ˌən-ˌȯ-ˌthen-ˈti-sə-tē 

-thən-

noun

Synonyms

• counterfeit
• fake
• false
• inauthentic
• forged

Examples of unauthentic in a Sentence

trying to sell unauthentic autographs of American presidents

Recent Examples on the Web

Inaccurate debunks Amid the recycled imagery, authentic pictures of National Guard members sleeping on the floor of a federal building in Los Angeles this week were falsely described as old or unauthentic. —Emma Li, CBS News, 11 June 2025

Both games made changes to the core formula that longtime players didn't appreciate, such as an influx of unauthentic skins and a departure from the class system. —Thomas G. Moukawsher, Newsweek, 5 Feb. 2025

Its ability to accurately discern and promptly respond to unauthentic negative reviews allows businesses to maintain a legitimate, trustworthy online image. —Jon Stojan, USA TODAY, 26 July 2023

Kingsford, has seen many American-Spanish restaurants in Rhode Island prepare paella, which requires a crunchy outside, in an unauthentic way. —Globe Staff, BostonGlobe.com, 2 June 2022

Word History

First Known Use

1631, in the meaning defined above

Rhymes for unauthentic

• inauthentic
• authentic