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impregnable
im·preg·na·ble [ im prégnəb'l ]


adjective 
Definition:
 
1. impossible to break into: too strong to be captured or entered by force
an impregnable fortress
2. unbeatable: unable to be shaken or destroyed by any outside influence
impregnable faith

im·preg·na·bil·i·ty [ im prègnə bíllətee ] noun
im·preg·na·bly [ im prégnəblee ] adverb
Encarta® World English Dictionary [North American Edition] © & (P)2009 Microsoft Corporation. All rights reserved. Developed for Microsoft by Bloomsbury Publishing Plc.
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