Impenetrable and Plain

Opposite meaning words

Impenetrable adjective - Being beyond one's powers to know, understand, or explain.

Usage example: the mysteries of that religion are completely impenetrable to outsiders

Show all Definitions

Plain is an antonym for impenetrable in incomprehensible topic.

Plain adjective - Free from all additions or embellishment.

Show all Definitions

Impenetrable is an antonym for plain.

Nearby Words: plainly, plainness, plaint

Cite this Source

Plain and Impenetrable. (2016). Retrieved 2026, August 15, from https://thesaurus.plus/related/impenetrable/plain

Impenetrable & Plain. N.p., 2016. Web. 15 Aug. 2026. <https://thesaurus.plus/related/impenetrable/plain>.

Plain or Impenetrable. 2016. Accessed August 15, 2026. https://thesaurus.plus/related/impenetrable/plain.

Google Ngram Viewer shows how "impenetrable" and "plain" have occurred on timeline