Firm and Impregnable

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mutual synonyms

Firm

Firm adjective - Not showing weakness or uncertainty.

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Synonyms for Firm

Antonyms for Firm

Impregnable and firm are semantically related In some cases you can use "Impregnable" instead an adjective "Firm".

Nearby Words: firming, firmness, firmly, firmed

Impregnable

Impregnable adjective - Impossible to get through or into.

Usage example: the castle's supposedly impregnable walls

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Synonyms for Impregnable

Antonyms for Impregnable

Firm and impregnable are semantically related in property topic. You can use "Firm" instead an adjective "Impregnable", if it concerns topics such as unyielding.

Nearby Words: impregnate, impregnation, impregnated, impregnability, impregnating

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Cite this Source

Impregnable and Firm. (2016). Retrieved 2026, August 15, from https://thesaurus.plus/related/firm/impregnable

Firm & Impregnable. N.p., 2016. Web. 15 Aug. 2026. <https://thesaurus.plus/related/firm/impregnable>.

Impregnable or Firm. 2016. Accessed August 15, 2026. https://thesaurus.plus/related/firm/impregnable.

Google Ngram Viewer shows how "firm" and "impregnable" have occurred on timeline