Improper and Prohibited

Improper

Improper adjective - Not appropriate for a particular occasion or situation.
Usage example: an improper use of slang in a formal piece of writing

Prohibited and improper are semantically related. In some cases you can use "Prohibited" instead an adjective "Improper".

Nearby Word: improperly

Prohibited

Prohibited adjective - That may not be permitted.
Usage example: there will be no toleration for smoking and other prohibited activities

Improper and prohibited are semantically related. Sometimes you can use "Improper" instead an adjective "Prohibited".

Cite this Source
Prohibited and Improper. (2016). Retrieved 2026, July 21, from https://thesaurus.plus/related/improper/prohibited
Improper & Prohibited. N.p., 2016. Web. 21 Jul. 2026. <https://thesaurus.plus/related/improper/prohibited>.
Prohibited or Improper. 2016. Accessed July 21, 2026. https://thesaurus.plus/related/improper/prohibited.
Google Ngram Viewer shows how "improper" and "prohibited" have occurred on timeline