1. (a.) Characterized by vice or defects; defective; faulty; imperfect.

2. (a.) Addicted to vice; corrupt in principles or conduct; depraved; wicked; as, vicious children; vicious examples; vicious conduct.

3. (a.) Wanting purity; foul; bad; noxious; as, vicious air, water, etc.

4. (a.) Not correct or pure; corrupt; as, vicious language; vicious idioms.

5. (a.) Not well tamed or broken; given to bad tricks; unruly; refractory; as, a vicious horse.

6. (a.) Bitter; spiteful; malignant.

Draconian Tartarean abominable acrimonious amoral animal anthropophagous arrant atrocious bad baleful baneful barbaric barbarous base beastly bestial bitchy bitter black blamable blameworthy bloodthirsty bloody bloody-minded brutal brutalized brute brutish cannibalistic concentrated contaminated corroding corrosive corrupt corrupting corruptive counterproductive criminal cruel cruel-hearted damaging damnable dark deadly defamatory degenerate degraded degrading deleterious demoniac demoniacal depraved desperate despiteful detrimental devilish diabolic diabolical disadvantageous disgraceful disserviceable distressing evil execrable exquisite faulty fearful fell feral ferine ferocious fiendish fiendlike fierce flagitious flagrant foul furious harmful hateful heinous hellish hurtful ill immoral improper inaccurate inauspicious inexpedient infamous inferior infernal inhuman inhumane iniquitous injurious invalid kill-crazy knavish lethal low malefic malevolent malicious malign malignant mean merciless mischievous miscreant monstrous murderous nasty naughty nefarious noisome noncivilized nonmoral noxious obnoxious odious ominous opprobrious peccant pernicious perverse perverted pitiless poisonous poor prejudicial profligate putrid rancorous rank ravening reprehensible reprobate rotten ruthless sadistic sanguinary sanguineous satanic savage scandalous scatheful septic severe shameful shameless sharkish sinful sinister slanderous slavering spiteful steeped in vice subhuman tameless terrible toxic truculent unchristian uncivilized unfavorable unforgivable ungentle unhealthy unhuman unkind unmoral unpardonable unpleasant unprincipled unskillful unsound unspeakable untamed untoward unworthy vehement venal venenate veneniferous venenous venomous vice-laden vice-prone vile villainous vindictive violent virulent wicked wild wolfish wrong