8 letters · 11 points in Scrabble
noun an inhabitant of Hell
adjective characteristic of or resembling Hell
adjective extremely evil or cruel; expressive of cruelty or befitting hell
originFrom Middle French infernal, from Medieval Latin infernalis, from Latin īnfernus, from īnferum (“netherworld, underworld, hell”), equivalent to inferno + -al.
Etymology from Wiktionary, CC BY-SA 3.0