Impermissible and Mandatory

Impermissible

Impermissible adjective - That may not be permitted.
Usage example: trial juries must be able to discern the difference between a permissible inference and impermissible speculation

Mandatory is an antonym for impermissible.

Mandatory

Mandatory adjective - Forcing one's compliance or participation by or as if by law.

Impermissible is an antonym for mandatory.

Nearby Words: mandate, mandated, mandatary, mandating
Cite this Source
Mandatory and Impermissible. (2016). Retrieved 2026, August 15, from https://thesaurus.plus/related/impermissible/mandatory
Impermissible & Mandatory. N.p., 2016. Web. 15 Aug. 2026. <https://thesaurus.plus/related/impermissible/mandatory>.
Mandatory or Impermissible. 2016. Accessed August 15, 2026. https://thesaurus.plus/related/impermissible/mandatory.
Google Ngram Viewer shows how "impermissible" and "mandatory" have occurred on timeline