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Definition of: impregnable
(im·preg′nə·bəl) adjective
1. Proof against attack; that cannot be taken.
2. Not to be overcome by temptation. See synonyms under INCONTESTABLE, SECURE. [<OF imprenable <im- not (<L in-) + prenable pregnable <prendre take <L prehendere]
—im·preg′na·bil′i·ty noun
—im·preg′na·bly adverb
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