Impregnable
Impregnable adjective - Incapable of being defeated, overcome, or subdued.
Precarious and impregnable are semantically related. In some cases you can use "Precarious" instead an adjective "Impregnable".
Precarious
Precarious adjective - Not secure; beset with difficulties.
Impregnable and precarious are semantically related. Sometimes you can use "Impregnable" instead an adjective "Precarious".
Nearby Word: precariously
Cite this Source
Precarious and Impregnable. (2016). Retrieved 2026, July 22, from https://thesaurus.plus/related/impregnable/precarious
Impregnable & Precarious. N.p., 2016. Web. 22 Jul. 2026. <https://thesaurus.plus/related/impregnable/precarious>.
Precarious or Impregnable. 2016. Accessed July 22, 2026. https://thesaurus.plus/related/impregnable/precarious.
Google Ngram Viewer shows how "impregnable" and "precarious" have occurred on timeline