Impermissible
Impermissible adjective - That may not be permitted.
Secret and impermissible are semantically related. In some cases you can use "Secret" instead an adjective "Impermissible".
Secret
Secret adjective - Undertaken or done so as to escape being observed or known by others.
Impermissible and secret are semantically related. Sometimes you can use "Impermissible" instead an adjective "Secret".
Mutual synonyms
Cite this Source
Secret and Impermissible. (2016). Retrieved 2026, August 03, from https://thesaurus.plus/related/impermissible/secret
Impermissible & Secret. N.p., 2016. Web. 03 Aug. 2026. <https://thesaurus.plus/related/impermissible/secret>.
Secret or Impermissible. 2016. Accessed August 03, 2026. https://thesaurus.plus/related/impermissible/secret.
Google Ngram Viewer shows how "impermissible" and "secret" have occurred on timeline