Impregnable
Impregnable adjective - Incapable of being defeated, overcome, or subdued.
Lasting and impregnable are semantically related. In some cases you can use "Lasting" instead an adjective "Impregnable".
Lasting
Lasting adjective - Having an existence or validity that does not change or diminish.
Impregnable and lasting are semantically related. Sometimes you can use "Impregnable" instead an adjective "Lasting".
Mutual synonyms
Related pairs
Cite this Source
Lasting and Impregnable. (2016). Retrieved 2026, July 21, from https://thesaurus.plus/related/impregnable/lasting
Impregnable & Lasting. N.p., 2016. Web. 21 Jul. 2026. <https://thesaurus.plus/related/impregnable/lasting>.
Lasting or Impregnable. 2016. Accessed July 21, 2026. https://thesaurus.plus/related/impregnable/lasting.
Google Ngram Viewer shows how "impregnable" and "lasting" have occurred on timeline