Impassable
Impassable adjective - Impossible to get through or into.
Usage example: the road was impassable until snowplows cleared it
Substantial and impassable are semantically related. In some cases you can use "Substantial" instead an adjective "Impassable".
Nearby Words: impasse, impassible
Substantial
Substantial adjective - Having great meaning or lasting effect.
Impassable and substantial are semantically related. Sometimes you can use "Impassable" instead an adjective "Substantial".
Cite this Source
Substantial and Impassable. (2016). Retrieved 2026, August 15, from https://thesaurus.plus/related/impassable/substantial
Impassable & Substantial. N.p., 2016. Web. 15 Aug. 2026. <https://thesaurus.plus/related/impassable/substantial>.
Substantial or Impassable. 2016. Accessed August 15, 2026. https://thesaurus.plus/related/impassable/substantial.
Google Ngram Viewer shows how "impassable" and "substantial" have occurred on timeline