Impenetrable
Impenetrable adjective - Impossible to get through or into.
Undefeatable and impenetrable are semantically related. In some cases you can use "Undefeatable" instead an adjective "Impenetrable".
Nearby Words: impenetrability, impenetrably
Undefeatable
Impenetrable and undefeatable are semantically related. Sometimes you can use "Impenetrable" instead an adjective "Undefeatable".
Mutual synonyms
Related pairs
- secure and impenetrable
- secure and undefeatable
- unyielding and impenetrable
- unyielding and undefeatable
- strong and impenetrable
- strong and undefeatable
- tough and impenetrable
- tough and undefeatable
- impregnable and impenetrable
- impregnable and undefeatable
- inviolable and impenetrable
- inviolable and undefeatable
- impassable and impenetrable
- impassable and undefeatable
Cite this Source
Undefeatable and Impenetrable. (2016). Retrieved 2026, July 28, from https://thesaurus.plus/related/impenetrable/undefeatable
Impenetrable & Undefeatable. N.p., 2016. Web. 28 Jul. 2026. <https://thesaurus.plus/related/impenetrable/undefeatable>.
Undefeatable or Impenetrable. 2016. Accessed July 28, 2026. https://thesaurus.plus/related/impenetrable/undefeatable.
Google Ngram Viewer shows how "impenetrable" and "undefeatable" have occurred on timeline