Impenetrable
Impenetrable adjective - Impossible to get through or into.
Unapproachable and impenetrable are semantically related. In some cases you can use "Unapproachable" instead an adjective "Impenetrable".
Nearby Words: impenetrability, impenetrably
Unapproachable
Unapproachable adjective - Hard or impossible to get to or get at.
Impenetrable and unapproachable are semantically related. Sometimes you can use "Impenetrable" instead an adjective "Unapproachable".
Mutual synonyms
Cite this Source
Unapproachable and Impenetrable. (2016). Retrieved 2026, August 02, from https://thesaurus.plus/related/impenetrable/unapproachable
Impenetrable & Unapproachable. N.p., 2016. Web. 02 Aug. 2026. <https://thesaurus.plus/related/impenetrable/unapproachable>.
Unapproachable or Impenetrable. 2016. Accessed August 02, 2026. https://thesaurus.plus/related/impenetrable/unapproachable.
Google Ngram Viewer shows how "impenetrable" and "unapproachable" have occurred on timeline