Preposterous and Sedate
Opposite meaning words
Preposterous
Preposterous adjective - Conceived or made without regard for reason or reality.
Sedate is an antonym for preposterous.
Sedate
Sedate adjective - Not joking or playful in mood or manner.
Usage example: while not exactly cold, the doctor does maintain a sedate and purely professional demeanor with his patients
Preposterous is an antonym for sedate.
Cite this Source
Sedate and Preposterous. (2016). Retrieved 2026, August 14, from https://thesaurus.plus/related/preposterous/sedate
Preposterous & Sedate. N.p., 2016. Web. 14 Aug. 2026. <https://thesaurus.plus/related/preposterous/sedate>.
Sedate or Preposterous. 2016. Accessed August 14, 2026. https://thesaurus.plus/related/preposterous/sedate.
Google Ngram Viewer shows how "preposterous" and "sedate" have occurred on timeline