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Adverb for not able to be overcome, subdued, or defeated
“The key to the Belgian defence along the Albert Canal was the supposedly impregnable fortress of Eben-Emael.”
Adverb for unable to be defeated or overcome
“Why, when you have an impregnable lead in the Tour de France, do you make a 140-kilometer solo escape, and add another eight minutes to your margin?”
Adverb for impossible to penetrate or pass through
“The Humboldt Glacier is probably the largest in the world, and it forms an impregnable barrier to Arctic explorations beyond it.”
Adverb for incontrovertible, beyond doubt or question
“I was struck by how fragile the outwardly impregnable theory of economics was.”
Adverb for certain to remain safe and unthreatened
Adverb for justifiable, well-maintained, or able to be defended
Adverb for never to be broken, infringed, or dishonoured
Adverb for unfaltering or unwavering
Related Words and Phrases
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