impregnable

[ im-preg-nuh-buhl ]

/ ɪmˈprɛg nə bəl /

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See synonyms for: impregnable / impregnability on Thesaurus.com

adjective

strong enough to resist or withstand attack; not to be taken by force, unconquerable: an impregnable fort.

not to be overcome or overthrown: an impregnable argument.

OTHER WORDS FOR impregnable

1 invulnerable.

2 unassailable.

See synonyms for impregnable on Thesaurus.com

OPPOSITES FOR impregnable

1 vulnerable.

See antonyms for impregnable on Thesaurus.com

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Question 1 of 7

Which sentence is correct?

His boss, whom he admires, is waiting to meet with him about the big project.

His boss, who he admires, is waiting to meet with him about the big project.

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Origin of impregnable

First recorded in 1400–50; late Middle English impregnable, imprenable, from Middle French, equivalent to im- im-² + prenable pregnable

synonym study for impregnable

1, 2. See invincible.

OTHER WORDS FROM impregnable

im·preg·na·bil·i·ty, im·preg·na·ble·ness, nounim·preg·na·bly, adverb

Words nearby impregnable

impractical, imprecate, imprecation, imprecise, impredicative, impregnable, impregnate, impregnated, impresa, impresario, imprescriptible

Other definitions for impregnable (2 of 2)

impregnable²

[ im-preg-nuh-buhl ]

/ ɪmˈprɛg nə bəl /

adjective

susceptible to impregnation, as an egg.

Origin of impregnable

impregn(ate) + -able

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

How to use impregnable in a sentence

It was a ponderous labyrinth of bolts, locks, and steel doors, making it an almost impregnable fortress.
The High Society Bank Robber of the 1800s|J. North Conway|October 19, 2014|DAILY BEAST
When Sherman reached those earthworks, he thought them the most impregnable he had ever seen.
Atlanta’s Fall Foretold The End Of Civil War Bloodshed|Marc Wortman|September 1, 2014|DAILY BEAST
His place in the hearts of most Thai is central and impregnable.
The Real Crisis in Thailand is the Coming Royal Succession|Somchai Samizdat|February 22, 2014|DAILY BEAST
Meanwhile, the Russians made the salient virtually impregnable.
WWII’s Greatest Battle: How Kursk Changed the War|Andrew Roberts|August 31, 2013|DAILY BEAST

But it was really the uemployment data that turned out to be his impregnable fortress.
Forget Ohio—September Jobs Report Was Romney’s Undoing|Daniel Gross|November 7, 2012|DAILY BEAST
The Prussians held an apparently impregnable position on the Landgrafenberg, a precipitous hill which commanded the town.
Napoleon's Marshals|R. P. Dunn-Pattison
These are truths—fixed facts, that quaint theory and exhausted moralising, are impregnable to, and fall harmlessly before.
The Condition, Elevation, Emigration, and Destiny of the Colored People of the United States|Martin R. Delany
This done, the fort was declared impregnable, and the tired travellers turned in, well assured of complete security.
Gold-Seeking on the Dalton Trail|Arthur R. Thompson
At the beginning of this year Antwerp, supposed to have been impregnable, surrendered to Marshal Gerard.
The History of England in Three Volumes, Vol.III.|E. Farr and E. H. Nolan
Here, at least, was a citadel impregnable by right-hand defections or left-hand extremes.
Tales and Fantasies|Robert Louis Stevenson

British Dictionary definitions for impregnable (1 of 2)

impregnable¹

/ (ɪmˈprɛɡnəbəl) /

adjective

unable to be broken into or taken by forcean impregnable castle

unable to be shaken or overcomeimpregnable self-confidence

incapable of being refutedan impregnable argument

Derived forms of impregnable

impregnability or impregnableness, nounimpregnably, adverb

Word Origin for impregnable

C15 imprenable, from Old French, from im- (not) + prenable able to be taken, from prendre to take

British Dictionary definitions for impregnable (2 of 2)

impregnable²

impregnatable (ˌɪmprɛɡˈneɪtəbəl)

/ (ɪmˈprɛɡnəbəl) /

adjective

able to be impregnated; fertile

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

impregnable

OTHER WORDS FOR impregnable

OPPOSITES FOR impregnable

Origin of impregnable

synonym study for impregnable

OTHER WORDS FROM impregnable

Words nearby impregnable

Other definitions for impregnable (2 of 2)

Origin of impregnable

Words related to impregnable

How to use impregnable in a sentence

British Dictionary definitions for impregnable (1 of 2)

Derived forms of impregnable

Word Origin for impregnable

British Dictionary definitions for impregnable (2 of 2)

impregnatable (ˌɪmprɛɡˈneɪtəbəl)