Authoritative and Impregnable

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Authoritative adjective - Being the most accurate and apparently thorough.

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

Nearby Words: authority, authoritarian

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

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Authoritative and impregnable are semantically related. Sometimes you can use "Authoritative" instead an adjective "Impregnable".

Cite this Source

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

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

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

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