vulnerable spot or weak point: Achilles' heel. handsome young man: Adonis. a predatory person or nagging woman: Harpy. tremendous in size, strength, difficulty, or effort: Herculean. symbol of a beautiful woman: Helen of Troy. majestic in manner: Olympian. Something that opens the door for badoccurrences, opened by someone known for curiosity: Pandora. some creature of inspiration: Muse. a symbol of immortality or rebirth: Phoenix. An opponent that cannot be beaten or overcome: Nemesis. a long journey: Odyssey. large, grand, enormous: Titanic. a person who is very lucky and makes money with whatever they do: Midas. a powerful man: Zeus