Impregnable and Penetrable

Opposite meaning words

Impregnable adjective - Impossible to get through or into.

Usage example: the castle's supposedly impregnable walls

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Penetrable is an antonym for impregnable.

Penetrable adjective - Capable of being passed into or through.

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Impregnable is an antonym for penetrable.

Cite this Source

Penetrable and Impregnable. (2016). Retrieved 2026, July 22, from https://thesaurus.plus/related/impregnable/penetrable

Impregnable & Penetrable. N.p., 2016. Web. 22 Jul. 2026. <https://thesaurus.plus/related/impregnable/penetrable>.

Penetrable or Impregnable. 2016. Accessed July 22, 2026. https://thesaurus.plus/related/impregnable/penetrable.

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