Impervious
Impervious adjective - Impossible to get through or into.
Usage example: the rain forest is impervious to all but the most dedicated explorers
Impregnable is a synonym for impervious in impermeable topic. In some cases you can use "Impregnable" instead an adjective "Impervious", when it comes to topics like impassible.
Nearby Word: imperviously
Impregnable
Impregnable adjective - Impossible to get through or into.
Usage example: the castle's supposedly impregnable walls
Impervious is a synonym for impregnable in impassible topic. You can use "Impervious" instead an adjective "Impregnable".
Mutual synonyms
Related pairs
- firm and impervious
- firm and impregnable
- fast and impervious
- fast and impregnable
- unyielding and impervious
- unyielding and impregnable
- tight and impervious
- tight and impregnable
- solid and impervious
- solid and impregnable
- strong and impervious
- strong and impregnable
- hard and impervious
- hard and impregnable
Cite this Source
Impregnable and Impervious. (2016). Retrieved 2026, August 15, from https://thesaurus.plus/related/impervious/impregnable
Impervious & Impregnable. N.p., 2016. Web. 15 Aug. 2026. <https://thesaurus.plus/related/impervious/impregnable>.
Impregnable or Impervious. 2016. Accessed August 15, 2026. https://thesaurus.plus/related/impervious/impregnable.
Google Ngram Viewer shows how "impervious" and "impregnable" have occurred on timeline