nefarious

not conforming to a high moral standard; morally unacceptable the chaste heroines and nefarious villains of old-time melodramas Synonyms black, dark, evil, immoral, iniquitous, bad, rotten, sinful, unethical, unlawful, unrighteous, unsavory, vicious, vile, villainous, wicked, wrongRelated Words base, contemptible, despicable, dirty, disreputable, evil-minded, ignoble, ill, infernal, low, mean, snide, sordid; atrocious, cruel, infamous, nasty; blamable, blameworthy, censurable, objectionable, obscene, offensive, reprehensible; corrupt, debased, debauched, degenerate, depraved, dissolute, libertine, loose, low-minded, perverted, reprobate, scrofulous, sick, unhealthy; cursed (also curst), cussed, defiling, noxious, pernicious, pestilential, ugly, ungodly, unwholesome; banned, barred, condemned, discouraged, forbidden, illegal, interdicted, outlawed, prohibited, proscribed, unauthorized, unclean; disallowed; execrable, lousy, miserable, wretched; errant, erring, fallen, unprincipled, unscrupulous; improper, incorrect, indecent, indecorous, naughty, unbecoming, unseemly, vulgar; dishonest, dishonorableNear Antonyms elevated, high, high-minded, law-abiding, legitimate, lofty, noble, principled, reputable, scrupulous; allowed, authorized, legal, licensed, permissible, permitted; approved, endorsed (also indorsed), sanctioned; abetted, encouraged, promoted, supported; clean, correct, decent, decorous, exemplary, proper, seemly; blameless, commendable, creditable, guiltless, legitimate; chaste, immaculate, incorruptible, innocent, inoffensive, irreproachable, lily-white, perfect, pure, spotless, squeaky-clean, uncorrupted, unerring, unfallen, unobjectionable, venerable, white, wholesome; esteemed, respected, upstanding, worthyAntonyms decent, ethical, good, honest, honorable, just, moral, right, righteous, sublime, upright, virtuous