adjective

guilty of or involving deceit; deceiving or misleading others.

a deceitful politician

dishonest,untruthful,lying,mendacious,insincere,false,deceiving,dissembling,disingenuous,untrustworthy,unscrupulous,unprincipled,two-faced,duplicitous,double-dealing,cheating,underhand,crafty,cunning,sly,guileful,scheming,calculating,conniving,designing,hypocritical,perfidious,treacherous,Machiavellian,Janus-faced,sneaky,tricky,foxy,crooked,sharp,shady,shifty,slippery,bent,slim,subtle,hollow-hearted,false-hearted,double-faced,truthless,Punic,fraudulent,counterfeit,fabricated,invented,concocted,made up,trumped up,untrue,hollow,sham,bogus,fake,illusory,spurious,specious,fallacious,deceptive,misleading,misguided,distorted,fakey,economical with the truth