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2. Achilles heel
A point of vulnerability.
The warrior Achilles was totally protected by his armor, except for a small spot by the back of his foot where an arrow went through.

A weakness for chocolate cake was the dieter's Achilles heel.
1. Achilles Heel
A weak point or quality of a person
The kid wasn't good at jump shots.
"Jump Shot are his Achilles Heel"
by the mess May 15, 2004 add a video
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