The definition of impregnable is something that cannot be destroyed or entered by force.adjective
A fort that has been very well secured and that cannot be broken into is an example of something that would be described as impregnable.YourDictionary definition and usage example. Copyright © 2013 by LoveToKnow Corp.
- not capable of being captured or entered by force
- unshakable; unyielding; firm: an impregnable belief
Origin: ME imprenable < OFr: see in- & pregnable
Origin: impregnate + -able
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- Impossible to capture or enter by force: an impregnable fortress.
- Difficult or impossible to attack, challenge, or refute with success: an impregnable argument.
Origin: Middle English imprenable, from Old French : in-, not (from Latin in-; see in-1) + prenable, pregnauble, pregnable; see pregnable.
- im·pregˈna·bly adverb
Origin: impregn(ate) + -able.