Indefeasible and Impregnable

Indefeasible

Indefeasible adjective - Not liable to being annulled or voided or undone.
Show all Definitions
Synonyms for Indefeasible

Impregnable and indefeasible are semantically related. in insurmountable topic. In some cases you can use "Impregnable" instead an adjective "Indefeasible".

Impregnable

Impregnable adjective - Incapable of being defeated, overcome, or subdued.

Indefeasible and impregnable are semantically related. You can use "Indefeasible" instead an adjective "Impregnable".

Cite this Source
Impregnable and Indefeasible. (2016). Retrieved 2026, July 28, from https://thesaurus.plus/related/indefeasible/impregnable
Indefeasible & Impregnable. N.p., 2016. Web. 28 Jul. 2026. <https://thesaurus.plus/related/indefeasible/impregnable>.
Impregnable or Indefeasible. 2016. Accessed July 28, 2026. https://thesaurus.plus/related/indefeasible/impregnable.
Google Ngram Viewer shows how "indefeasible" and "impregnable" have occurred on timeline