unprincipled Synonyms

licentious immoral unsporting unconscionable treacherous swindling sneaky sinful simoniacal shifty shameless shameful shady rotten roguish reprobate underhand underhanded unfair opportunistic unethical dishonourable amoral scoundrelly unprofessional untrustworthy wicked villainous vile venal untruthful unscrupulous unmoral unlawful profligate praetorian perfidious degenerate deceitful decadent debauched cunning crooked criminal crafty corruptible corrupt conscienceless blackguardly base