Frivolous and Grim
Opposite meaning words
Frivolous
Grim
Grim adjective - Harsh and threatening in manner or appearance.
Usage example: a grim and short-tempered shopkeeper who didn't exactly invite friendly conversation
Cite this Source
Grim and Frivolous. (2016). Retrieved 2026, August 14, from https://thesaurus.plus/related/frivolous/grim
Frivolous & Grim. N.p., 2016. Web. 14 Aug. 2026. <https://thesaurus.plus/related/frivolous/grim>.
Grim or Frivolous. 2016. Accessed August 14, 2026. https://thesaurus.plus/related/frivolous/grim.
Google Ngram Viewer shows how "frivolous" and "grim" have occurred on timeline