Simple Definition of impregnable
: not able to be captured by attack : very strong
: not likely to be weakened or changed
Examples of impregnable in a sentence
<an impregnable fortress that had foiled one invader after another over the centuries>
<the castle's supposedly impregnable walls>
Did You Know?
Since the days when the Norman French ruled England, English-speakers have been captured by the allure of French terms. Impregnable is one of the many English words that bear a French ancestry. It derives from the Middle French verb prendre, which means "to take or capture." Combining prendre with various prefixes has given our language many other words, too, including surprise, reprise and enterprise.
Origin and Etymology of impregnable
Middle English imprenable, from Middle French, from in- + prenable vulnerable to capture, from prendre to take — more at prize
First Known Use: 15th century
IMPREGNABLE Defined for Kids
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