adjective

behaving or prone to behave in an untrustworthy, deceitful, or insincere way.

he was a dishonest hypocrite prepared to exploit his family

fraudulent,corrupt,swindling,cheating,double-dealing,underhand,crafty,cunning,devious,designing,treacherous,perfidious,unfair,unjust,disreputable,rascally,roguish,dirty,unethical,immoral,dishonourable,unscrupulous,unprincipled,amoral,criminal,illegal,unlawful,false,untruthful,deceitful,deceiving,deceptive,Janus-faced,lying,mendacious,untrustworthy,crooked,shady,tricky,sharp,shifty,bent,dodgy,shonky,slim,malfeasant,knavish,subtle,hollow-hearted,false-hearted,double-faced,truthless