Achilles' heel
Say it: uh-KIL-eez heel /əˌkɪliːz ˈhiːl/ · idiom
What “Achilles' heel” means
One serious weakness in someone or something otherwise strong.
More precisely: A small but serious weakness in someone or something otherwise strong.
When to use it
When identifying the weakness that could undermine an otherwise strong person or plan. Common in discussion and writing.
Similar words
weak spot, vulnerability, soft underbelly
Where it comes from
Greek myth: Achilles was invulnerable except at the heel by which his mother held him.
Quick check
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strong suit or Achilles' heel?
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Achilles' heel
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