Dictionary
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.
susceptible to impregnation, as an egg.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.