counterfeit >> /ˈkaʊn(t)ərˌfɪt/
Definition: [transitive verb] Imitate fraudulently.
Example: my signature is extremely hard to counterfeit
Definition: [noun] A fraudulent imitation of something else; a forgery.
Example: he knew the tapes to be counterfeits
Definition: [adjective] Made in exact imitation of something valuable or important with the intention to deceive or defraud.
Example: two men were remanded on bail on a charge of passing counterfeit $10 bills