demonic, diabolic, diabolical, fiendish, hellish, infernal, satanic, unholy - extremely evil or cruel; expressive of cruelty or befitting hell; "something demonic in him--something that could be cruel"; "fires lit up a diabolic scene"; "diabolical sorcerers under the influence of devils"; "a fiendish despot"; "hellish torture"; "infernal instruments of war"; "satanic cruelty"; "unholy grimaces" Antonym:good (indirect, via evil)
blasted, blame, blamed, blessed, damn, damned, darned, deuced, everlasting, goddam, goddamn, goddamned, infernal - expletives used informally as intensifiers; "he's a blasted idiot"; "it's a blamed shame"; "a blame cold winter"; "not a blessed dime"; "I'll be damned (or blessed or darned or goddamned) if I'll do any such thing"; "he's a damn (or goddam or goddamned) fool"; "a deuced idiot"; "tired or his everlasting whimpering"; "an infernal nuisance" Antonyms:blessed, blest (indirect, via cursed)