Englishvillainous
adjective
Captain Mason led the villainous attack on the sleeping village:
wicked, evil, iniquitous, sinful, nefarious, vile, foul, monstrous, shocking, outrageous, atrocious, abominable, reprehensible, hateful, detestable, despicable, odious, contemptible, horrible, heinous, execrable, diabolical, diabolic, fiendish, vicious, murderous, barbarous, dark, rotten;
criminal, illicit, unlawful, illegal, illegitimate, lawless, felonious, indictable, transgressing, wrong, immoral, corrupt, degenerate, reprobate, sordid, depraved, dissolute, bad, base, dishonourable, dishonest, unscrupulous, unprincipled, underhand, roguish;
informal crooked, bent, warped, low-down, stinking, dirty, shady, rascally, scoundrelly;
British, informal beastly, not cricket;
Law malfeasant;
archaic dastardly;
rare egregious, flagitious.
▷antonyms good, virtuous.
villainous Oxford Dictionary of English