Impregnable
Impregnable adjective - Impossible to get through or into.
Usage example: the castle's supposedly impregnable walls
Rigid and impregnable are semantically related. In some cases you can use "Rigid" instead an adjective "Impregnable".
Rigid
Rigid adjective - Not allowing for any exceptions or loosening of standards.
Impregnable and rigid are semantically related. Sometimes you can use "Impregnable" instead an adjective "Rigid".
Mutual synonyms
Related pairs
- firm and impregnable
- firm and rigid
- resolute and impregnable
- resolute and rigid
- fixed and impregnable
- fixed and rigid
- steadfast and impregnable
- steadfast and rigid
- inflexible and impregnable
- inflexible and rigid
- unyielding and impregnable
- unyielding and rigid
- immovable and impregnable
- immovable and rigid
Cite this Source
Rigid and Impregnable. (2016). Retrieved 2026, July 21, from https://thesaurus.plus/related/impregnable/rigid
Impregnable & Rigid. N.p., 2016. Web. 21 Jul. 2026. <https://thesaurus.plus/related/impregnable/rigid>.
Rigid or Impregnable. 2016. Accessed July 21, 2026. https://thesaurus.plus/related/impregnable/rigid.
Google Ngram Viewer shows how "impregnable" and "rigid" have occurred on timeline