Impregnable and Weak

Impregnable

Impregnable adjective - Incapable of being defeated, overcome, or subdued.
Usage example: an impregnable fortress that had foiled one invader after another over the centuries

Weak is an antonym for impregnable.

Weak

Weak adjective - Lacking bodily strength.

Impregnable is an antonym for weak.

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