Impregnable
Impregnable adjective - Incapable of being defeated, overcome, or subdued.
Rough go and impregnable are semantically related. In some cases you can use "Rough go" instead an adjective "Impregnable".
Rough go
Impregnable and rough go are semantically related. Sometimes you can use "Impregnable" instead an adjective phrase "Rough go".
Mutual synonyms
Cite this Source
Rough go and Impregnable. (2016). Retrieved 2026, July 22, from https://thesaurus.plus/related/impregnable/rough_go
Impregnable & Rough go. N.p., 2016. Web. 22 Jul. 2026. <https://thesaurus.plus/related/impregnable/rough_go>.
Rough go or Impregnable. 2016. Accessed July 22, 2026. https://thesaurus.plus/related/impregnable/rough_go.
Google Ngram Viewer shows how "impregnable" and "rough go" have occurred on timeline