infernal - noun

an inhabitant of Hell

infernal - adjective

• characteristic of or resembling Hell
• of or pertaining to or characteristic of a very uncontrolled and intense fire
• being of the underworld
• extremely evil or cruel; expressive of cruelty or befitting hell
• expletives used informally as intensifiers

infernal - thesaurus

blame   blamed   blasted   blessed   damn   damned   darned   demonic   deuced   diabolic   diabolical   fiendish   goddam   goddamn   goddamned   hellish   satanic   unholy