1. (superl.) Furious; violent; unrestrained; impetuous; as, a fierce wind.

2. (superl.) Vehement in anger or cruelty; ready or eager to kill or injure; of a nature to inspire terror; ferocious.

3. (superl.) Excessively earnest, eager, or ardent.

Draconian Tartarean abandoned acid acidulous acrid acrimonious acute aggressive amok angry animal antagonistic anthropophagous astringent atrocious awful barbaric barbarous battling beastly bellicose belligerent bellowing berserk bestial biting bitter bloodthirsty bloody bloody-minded brutal brutalized brute brutish cannibalistic carried away caustic chauvinist chauvinistic combative concentrated contentious cruel cruel-hearted cutting dangerous delirious demoniac demoniacal desperate devilish diabolic dire distracted double-edged drastic dreadful ecstatic edged enemy enraged enraptured escharotic excessive exorbitant exquisite extravagant extreme fell feral ferine ferocious fiendish fiendlike fiery fighting fighting mad frantic frenzied full of fight fulminating fuming furious great grim haggard harsh hawkish hellish hog-wild homicidal hopping mad hostile hotheaded howling hysterical immoderate impetuous in a rage in a transport in hysterics incisive infernal infuriate infuriated inhuman inhumane inimical inordinate intemperate intense intoxicated intractable jingo jingoish jingoist jingoistic keen kill-crazy mad maddened madding malign malignant maniac martial menacing merciless militant militaristic military mordacious mordant murderous noncivilized offensive orgasmic orgiastic outrageous passionate penetrating piercing pitiless poignant possessed pugnacious quarrelsome rabid racking raging ramping ranting raving raving mad ravished rigorous roaring roaring mad rough running mad ruthless saber-rattling sadistic sanguinary sanguineous satanic savage scathing scrappy severe sharkish sharp simmering slavering soldierlike soldierly splitting stabbing stinging storming stormy strident stringent subhuman superlative supreme tameless tart tempestuous terrible threatening tigerish tornadic tough transcendent transported trenchant trigger-happy truculent tumultuous turbulent unchristian uncivilized unconscionable uncontrollable unfriendly ungentle unhuman unpacific unpeaceable unpeaceful untamed vehement venomous vicious violent virulent vitriolic volcanic warlike warmongering warring wild wild-eyed wild-looking wolfish