Impregnable
Impregnable adjective - Incapable of being defeated, overcome, or subdued.
Inaccessible and impregnable are semantically related. In some cases you can use "Inaccessible" instead an adjective "Impregnable".
Inaccessible
Inaccessible adjective - Hard or impossible to get to or get at.
Impregnable and inaccessible are semantically related. Sometimes you can use "Impregnable" instead an adjective "Inaccessible".
Nearby Word: inaccessibility
Cite this Source
Inaccessible and Impregnable. (2016). Retrieved 2026, July 21, from https://thesaurus.plus/related/impregnable/inaccessible
Impregnable & Inaccessible. N.p., 2016. Web. 21 Jul. 2026. <https://thesaurus.plus/related/impregnable/inaccessible>.
Inaccessible or Impregnable. 2016. Accessed July 21, 2026. https://thesaurus.plus/related/impregnable/inaccessible.
Google Ngram Viewer shows how "impregnable" and "inaccessible" have occurred on timeline