Impervious
Impervious adjective - Not allowing penetration (as by gas, liquid, or light).
Unviable and impervious are semantically related. In some cases you can use "Unviable" instead an adjective "Impervious".
Nearby Word: imperviously
Unviable
Impervious and unviable are semantically related. Sometimes you can use "Impervious" instead an adjective "Unviable".
Mutual synonyms
Cite this Source
Unviable and Impervious. (2016). Retrieved 2026, July 28, from https://thesaurus.plus/related/impervious/unviable
Impervious & Unviable. N.p., 2016. Web. 28 Jul. 2026. <https://thesaurus.plus/related/impervious/unviable>.
Unviable or Impervious. 2016. Accessed July 28, 2026. https://thesaurus.plus/related/impervious/unviable.
Google Ngram Viewer shows how "impervious" and "unviable" have occurred on timeline