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Meaning of impregnable

im•preg•na•ble

Pronunciation: (im-preg'nu-bul), [key]
— adj.
  1. strong enough to resist or withstand attack; not to be taken by force, unconquerable: an impregnable fort.
  2. not to be overcome or overthrown: an impregnable argument.

im•preg•na•ble

Pronunciation: (im-preg'nu-bul), [key]
— adj.
  1. susceptible to impregnation, as an egg.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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