Impregnable and Plain

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Impregnable adjective - Incapable of being defeated, overcome, or subdued.

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

Plain adjective - Free from all additions or embellishment.

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Impregnable and plain are semantically related. Sometimes you can use "Impregnable" instead an adjective "Plain".

Nearby Words: plainly, plainness, plaint

Cite this Source

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

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

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

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