Harebrained and Serious
Opposite meaning words
Harebrained
Harebrained adjective - Lacking in seriousness or maturity.
Usage example: the movie follows the harebrained antics of a pair of stoners who seem incapable of growing up
Serious is an antonym for harebrained.
Serious
Serious adjective - Not joking or playful in mood or manner.
Usage example: I'm serious when I say that no one should be walking in that neighborhood at night
Harebrained is an antonym for serious.
Nearby Words: seriously, seriousness
Cite this Source
Serious and Harebrained. (2016). Retrieved 2026, July 22, from https://thesaurus.plus/related/harebrained/serious
Harebrained & Serious. N.p., 2016. Web. 22 Jul. 2026. <https://thesaurus.plus/related/harebrained/serious>.
Serious or Harebrained. 2016. Accessed July 22, 2026. https://thesaurus.plus/related/harebrained/serious.
Google Ngram Viewer shows how "harebrained" and "serious" have occurred on timeline