Definition of impregnable
- an impregnable fortress
Theme music by Joshua Stamper ©2006 New Jerusalem Music/ASCAP
an impregnable fortress that had foiled one invader after another over the centuries
the castle's supposedly impregnable walls
These example sentences are selected automatically from various online news sources to reflect current usage of the word 'impregnable.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.
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.
: not able to be captured by attack : very strong
: not likely to be weakened or changed
What made you want to look up impregnable? Please tell us where you read or heard it (including the quote, if possible).