Impregnable meaning

ĭm-prĕgnə-bəl
The definition of impregnable is something that cannot be destroyed or entered by force.

A fort that has been very well secured and that cannot be broken into is an example of something that would be described as impregnable.

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Impossible to capture or enter by force.

An impregnable fortress.

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Difficult or impossible to attack, challenge, or refute with success.

An impregnable argument.

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Capable of being impregnated.
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Not capable of being captured or entered by force.
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Unshakable; unyielding; firm.

An impregnable belief.

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That can be impregnated.
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Capable of being impregnated.
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(of a fortress, wall, etc., also used figuratively) Too strong to be penetrated.
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Capable of being impregnated.

Following treatment, twenty percent of previously infertile females were impregnable.

Application of the compound rendered the non-porous surface impregnable.

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Origin of impregnable

  • Middle English imprenable from Old French in- not (from Latin in- in–1) prenable, pregnauble pregnable pregnable

    From American Heritage Dictionary of the English Language, 5th Edition

  • impregn(ate) –able

    From American Heritage Dictionary of the English Language, 5th Edition

  • From Middle French imprenable, im- (“not”), + prendre (“to take”) +-able (“able to be the object of an action”). Intrusive g added 16c on model of deign, reign.

    From Wiktionary

  • From impregnate +‎ -able, ultimately from Latin impraegnatus (“made pregnant”).

    From Wiktionary