unauthentic

adjective
un·​au·​then·​tic | \ˌən-ə-ˈthen-tik, -ȯ-\

Definition of unauthentic 

: not real, accurate, or sincere : not authentic : inauthentic an unauthentic document unauthentic ingredients

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Other Words from unauthentic

unauthentically \ˌən-​ə-​ˈthen-​ti-​k(ə-​)lē, -​ȯ-​ \ adverb
unauthenticity \ˌən-​ˌȯ-​ˌthen-​ˈti-​sə-​tē, -​thən-​ \ noun

Synonyms & Antonyms for unauthentic

Synonyms

bogus, counterfeit, fake, false, forged, inauthentic, phony (also phoney), queer, sham, snide, spurious

Antonyms

authentic, bona fide, genuine, real, unfaked

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First Known Use of unauthentic

1631, in the meaning defined above

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The first known use of unauthentic was in 1631

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