Diabolic

Adjective

 * 1) Showing wickedness typical of a devil.
 * 2) Extremely evil or cruel.
 * fires lit up a diabolic scene

Synonyms

 * devilish, mephistophelian, mephistophelean
 * demonic, fiendish, hellish, infernal, satanic, unholy

Related terms

 * diabolical
 * diabolically
 * diabolicalness

Adverbs for Diabolic
inconceivably; iniquitously; incredibly; incorrigibly; atrociously: infernally; shockingly; manifestly; openly; flagrantly; exceptionably; horribly; outrageously; incurably; obdurately; stubbornly; nefariously; villainously; execrably; accursedly; inhumanly; ruthlessly.

Thesaurus
Draconian, Mephistophelian, Tartarean, abominable, accursed, animal, anthropophagous, appalling, atrocious, awful, bad, barbaric, barbarous, base, beastly, bestial, bloodthirsty, bloody, bloody-minded, brutal, brutalized, brute, brutish, cannibalistic, corrupt, cruel, cruel-hearted, cursed, damnable, demoniac, demoniacal, demonic, demonish, demonlike, depraved, devil-like, devilish, diabolical, dreadful, evil, execrable, fell, feral, ferocious, fiendish, fiendlike, fierce, flagitious, foul, ghoulish, heinous, hellborn, hellish, hideous, horrible, horrid, ill, impious, infernal, inhuman, inhumane, iniquitous, maleficent, malevolent, malicious, malign, monstrous, murderous, odious, ogreish, ruthless, sadistic, sanguinary, sanguineous, satanic, savage, serpentine, sharkish, sinful, sinister, slavering, subhuman, terrible, truculent, unchristian, uncivilized, ungodly, unhallowed, unhuman, vicious, vile, wicked, wolfish