Adjective infernal has 5 senses
  1. infernal - characteristic of or resembling hell; "infernal heat and noise"
  2. 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)
  3. 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)
  4. infernal - relating to or inhabiting hell; "his infernal majesty"; "infernal fires"; "infernal punishments"
  5. infernal - being of a lower world of the dead; "infernal regions"
    Antonym:
    supernal
,Noun infernal has 1 sense
  1. infernal - an inhabitant of hell; "his roar made the infernals quake"
    --1 is a kind of
    dead person, dead soul, deceased person, deceased, decedent, departed
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