Imperturbable and Roisterous
Opposite meaning words
Imperturbable
Imperturbable adjective - Not easily panicked or upset.
Roisterous is an antonym for imperturbable.
Nearby Word: imperturbability
Roisterous
Roisterous adjective - Being rough or noisy in a high-spirited way.
Usage example: students were told that it was possible to have a roisterous victory celebration without resorting to violence
Imperturbable is an antonym for roisterous.
Cite this Source
Roisterous and Imperturbable. (2016). Retrieved 2026, August 01, from https://thesaurus.plus/related/imperturbable/roisterous
Imperturbable & Roisterous. N.p., 2016. Web. 01 Aug. 2026. <https://thesaurus.plus/related/imperturbable/roisterous>.
Roisterous or Imperturbable. 2016. Accessed August 01, 2026. https://thesaurus.plus/related/imperturbable/roisterous.
Google Ngram Viewer shows how "imperturbable" and "roisterous" have occurred on timeline