(ˌʌnɔːˈθɛntɪk) adjnot authentic or genuine; deceptiveThesaurus
Adj.
1.
unauthentic - intended to deceive; "a spurious work of art"inauthentic, spuriouscounterfeit, imitative - not genuine; imitating something superior; "counterfeit emotion"; "counterfeit money"; "counterfeit works of art"; "a counterfeit prince"