impregnable

adjective im·preg·na·ble \ im-ˈpreg-nə-bəl \

Definition of impregnable

1 : incapable of being taken by assault : unconquerable
  • an impregnable fortress
2 : unassailable; also : impenetrable
  • impregnable walls

impregnability

play \(ˌ)im-ˌpreg-nə-ˈbi-lə-tē\ noun

impregnableness

play \im-ˈpreg-nə-bəl-nəs\ noun

impregnably

play \-blē\ adverb

impregnable was our Word of the Day on 09/01/2014. Hear the podcast!

Examples of impregnable in a Sentence

  1. an impregnable fortress that had foiled one invader after another over the centuries

  2. the castle's supposedly impregnable walls

Recent Examples of impregnable from the Web

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.

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


IMPREGNABLE Defined for English Language Learners

impregnable

adjective

Definition of impregnable for English Language Learners

  • : not able to be captured by attack : very strong

  • : not likely to be weakened or changed


IMPREGNABLE Defined for Kids

impregnable

adjective im·preg·na·ble \ im-ˈpreg-nə-bəl \

Definition of impregnable for Students

: not able to be captured by attack : unconquerable


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allowing a liquid or gas to pass through

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