Impregnable and Solid

Impregnable

Impregnable adjective - Impossible to get through or into.
Usage example: the castle's supposedly impregnable walls

Solid and impregnable are semantically related. in property topic. In some cases you can use "Solid" instead an adjective "Impregnable", when it comes to topics like unyielding.

Solid

Solid adjective - Based on sound reasoning or information.

Impregnable and solid are semantically related. Sometimes you can use "Impregnable" instead an adjective "Solid".

Nearby Words: solidify, solidly, solidity, solidified

Both words in one sentence

Cite this Source
Solid and Impregnable. (2016). Retrieved 2026, July 21, from https://thesaurus.plus/related/impregnable/solid
Impregnable & Solid. N.p., 2016. Web. 21 Jul. 2026. <https://thesaurus.plus/related/impregnable/solid>.
Solid or Impregnable. 2016. Accessed July 21, 2026. https://thesaurus.plus/related/impregnable/solid.
Google Ngram Viewer shows how "impregnable" and "solid" have occurred on timeline