unscrupulous synonyms

base illegal unfair wicked petty selfish corrupt sly slippery questionable improper illegitimate dishonest immoral disgraceful unorthodox scandalous degraded degrading unworthy tortuous shifty unethical shameless disingenuous unprincipled roguish venal perfidious arrant rascally knavish self-seeking dishonorable double-faced underhanded two-faced conscienceless Machiavellian casuistic recreant