or Achilles' heel
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Origin of Achilles heel
British Dictionary definitions for achilles' heel
Cultural definitions for achilles' heel
A point of vulnerability. (See Achilles.)
Idioms and Phrases with achilles' heel
A fatal weakness, a vulnerable area, as in This division, which is rarely profitable, is the company's Achilles' heel. The term alludes to the Greek legend about the heroic warrior Achilles whose mother tried to make him immortal by holding the infant by his heel and dipping him into the River Styx. Eventually he was killed by an arrow shot into his undipped heel. [c. 1800]