What is a synonym for unethical?

cheating, corrupt, crooked, dirty*, dirty-dealing,dishonorable, disreputable, double-crossing, fake,fishy, flimflam, fly-by-night, illegal, improper,mercenary, scam*, shady*, sharp*, slick*,slippery*, sneaky*, two-faced, two-timing,underhand, unfair, unprincipled, unprofessional,unscrupulous, wrong

got it from thesaurus .com