Hellfire

wiktionary

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From Middle English helle fire, helever, from Old English hellefȳr, equivalent to hell +‎ fire. Cognate with West Frisian helfjoer(“hellfire”), Dutch hellevuur(“hellfire”), German Höllenfeuer(“hellfire”).

etymonline

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hellfire (n.)

also hell-fire, "the fire of Hell, eternal torment," from Old English hellefyr, in which helle is the genitive case of hell. It translates Greek gehenna tou pyros, literally "hell of fire." Also used in Middle English for "erysipelas" (mid-15c.).