counterfeit
adj.adj. not real, but made to look like something valuable. You use this word when something is a fake copy of a genuine item.
adj. not genuine; made in exact imitation of something valuable for the purpose of deception.
The shop sold counterfeit designer bags.
Police seized a shipment of counterfeit electronics that lacked official safety certifications.
The museum curator discovered that the painting was a clever counterfeit, created by an artist who studied the master's technique for decades.
From Middle English counterfeit, countrefet, from Anglo-Norman countrefait, from Old French contrefait, from Latin contra- (“against”) + Latin facere (“to make”). Piecewise doublet of contrafactum.
Often used attributively before a noun (e.g. 'counterfeit money').