Clearheaded and Slaphappy
Opposite meaning words
Clearheaded
Clearheaded adjective - Not mentally confused; able to think clearly and act intelligently.
Slaphappy is an antonym for clearheaded.
Slaphappy
Slaphappy adjective - Suffering from mental confusion.
Usage example: we were slaphappy with exhaustion after the nightlong train ride
Clearheaded is an antonym for slaphappy.
Cite this Source
Slaphappy and Clearheaded. (2016). Retrieved 2026, August 13, from https://thesaurus.plus/related/clearheaded/slaphappy
Clearheaded & Slaphappy. N.p., 2016. Web. 13 Aug. 2026. <https://thesaurus.plus/related/clearheaded/slaphappy>.
Slaphappy or Clearheaded. 2016. Accessed August 13, 2026. https://thesaurus.plus/related/clearheaded/slaphappy.
Google Ngram Viewer shows how "clearheaded" and "slaphappy" have occurred on timeline