Preposterous
Preposterous adjective - Showing or marked by a lack of good sense or judgment.
Usage example: a preposterous suggestion to go swimming in this freezing weather
Sane
Sane adjective - Having full use of one's mind and control over one's actions.
Preposterous is an antonym for sane.
Nearby Word: sanity
Both words in one sentence
- Simple inspection of this view reveals how preposterous it is, only the truly mental would use C for the speed of light, any sane person would obviously use L.
Cite this Source
Sane and Preposterous. (2016). Retrieved 2026, July 21, from https://thesaurus.plus/related/preposterous/sane
Preposterous & Sane. N.p., 2016. Web. 21 Jul. 2026. <https://thesaurus.plus/related/preposterous/sane>.
Sane or Preposterous. 2016. Accessed July 21, 2026. https://thesaurus.plus/related/preposterous/sane.
Google Ngram Viewer shows how "preposterous" and "sane" have occurred on timeline