Square the circle

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Meaning

To try an impossible task, seeking what can't be.

Origin

From ancient Greece, tied to math; squaring a circle baffled Euclid (300 BCE), slang by 1600s for vain. A 1631 Donne poem uses it for a lost cause.

Usage Examples

  • Fixing that's like squaring the circle; no chance.
  • He's trying to square the circle with that plan.
  • Square the circle? Good luck with that!

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