Impromptu and Mock
Opposite meaning words
Impromptu
Impromptu adjective - Made or done without previous thought or preparation.
Mock
Mock adjective - Lacking in natural or spontaneous quality.
Usage example: since I had inadvertently learned what I was getting, I opened the present with mock surprise
Cite this Source
Mock and Impromptu. (2016). Retrieved 2026, July 22, from https://thesaurus.plus/related/impromptu/mock
Impromptu & Mock. N.p., 2016. Web. 22 Jul. 2026. <https://thesaurus.plus/related/impromptu/mock>.
Mock or Impromptu. 2016. Accessed July 22, 2026. https://thesaurus.plus/related/impromptu/mock.
Google Ngram Viewer shows how "impromptu" and "mock" have occurred on timeline