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Use "arch-enemy" in a sentence
"The death of his arch-enemy led Snart to leave the world of crime and he worked briefly as a bounty hunter with his sister Lisa (the Golden Glider)."
"Reality intersects with delusion in the mind of Arthur Poppington (Woody Harrelson), a regular man who adopts a superhero persona known as Defendor, and combs the city streets at night in search of his arch-enemy, Captain Industry."
"This is Thulsa Doom, one day to be a major arch-enemy to Kull and Conan, necromancer and mastermind, what do you think?"