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Difference between Flounder and Founder

Flounder means to behave awkwardly or move in a clumsy way.

  • The key witness floundered during her testimony.
  • Art floundered a minute on the ice before gaining his balance.

Founder means to sink or collapse.

  • On its approach, the boat struck a reef and quickly foundered.
  • The prosecutor’s case foundered after a key witness’ testimony.