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pregnable

adjective preg·na·ble \ ˈpreg-nə-bəl \

Definition of pregnable

:vulnerable to capture
  • a pregnable fort
—

pregnability

play \ˌpreg-nə-ˈbi-lə-tē\ noun

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Origin and Etymology of pregnable

alteration of Middle English prenable, from Anglo-French — more at impregnable

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