Villainous

Adjective

 * of, relating to, or appropriate to a villain
 * 1) obnoxious, offensive or reprehensible in nature or behaviour; nefarious

Adverbs for Villainous
unmistakably; utterly; despicably; unhappily; terribly; dreadfully; unspeakably; infamously; conspicuously; incredibly; unimaginably; remarkably; contemptibly; defiantly; openly; secretly, blandly; actually; manifestly.

Thesaurus
abandoned, abominable, arrant, atrocious, awful, bad, base, beastly, beneath contempt, bent, black, blackguardly, blamable, blameworthy, brutal, contemptible, contrary, corrupt, criminal, crooked, damnable, dark, debased, degenerate, degraded, deplorable, despicable, detestable, dire, disgraceful, disgusting, dishonest, dissolute, dreadful, egregious, enormous, evil, execrable, faithless, felonious, fetid, filthy, flagitious, flagrant, foul, fulsome, grievous, gross, hateful, heinous, horrible, horrid, improper, infamous, iniquitous, knavish, lamentable, loathsome, lousy, low, miscreant, monstrous, murderous, nasty, naughty, nefarious, noisome, notorious, objectionable, obnoxious, odious, offensive, outrageous, peccant, perfidious, perverse, perverted, pitiable, pitiful, profligate, putrid, rank, rascally, recreant, regrettable, reprehensible, reprobate, repulsive, roguish, rotten, sad, scampish, scandalous, schlock, scoundrelly, scurvy, shabby, shameful, shocking, shoddy, sinful, sordid, squalid, terrible, too bad, traitorous, treacherous, unclean, unforgivable, unpardonable, unscrupulous, unspeakable, unworthy, vicious, vile, wicked, woeful, worst, worthless, wretched, wrong