characterized by, involving, or proceeding from fraud, as actions, enterprise, methods, or gains

a fraudulent scheme to evade taxes.

given to or using fraud, as a person; cheating; dishonest.

adjective

authentic , genuine , honest , real , valid

adjective

bamboozling , counterfeit , crafty , criminal , crooked , deceitful , devious , dishonest , dishonorable , double-dealing * , duplicitous , fake , forged , mock , phony , pseudo , sham * , spurious , swindling , treacherous , tricky , bogus , false , sham , suppositious , supposititious , cheating , clandestine , cunning , deceiving , deceptive , knavish , misleading , snide , subtle , surreptitious , underhand , wily