1. (a.) Cruel; barbarous; savage; unfeeling\; destitute of the kindness and tenderness that belong to a human being;

2. (a.) Characterized by, or attended with, cruelty; as, an inhuman act or punishment.

Draconian Tartarean animal anthropophagous atrocious barbaric barbarous beastly bestial bloodthirsty bloody bloody-minded brutal brutalized brute brutish callous cannibalistic cold-blooded cruel cruel-hearted demoniac demoniacal demonic demonish demonlike devil-like devilish diabolic diabolical fell feral ferine ferocious fiendish fiendlike fierce ghoulish heartless hellish implacable infernal inhumane insensitive kill-crazy malicious malign malignant merciless murderous noncivilized ogreish pitiless relentless ruthless sadistic sanguinary sanguineous satanic savage severe sharkish slavering subhuman tameless truculent unchristian uncivilized uncompassionate unfeeling ungentle unhuman unkind unkindly unrelenting unsympathetic untamed vicious wild wolfish