Roisterous and Unflappable

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

Unflappable is an antonym for roisterous.

Unflappable

Unflappable adjective - Not easily panicked or upset.

Roisterous is an antonym for unflappable.
Cite this Source
Unflappable and Roisterous. (2016). Retrieved 2026, August 01, from https://thesaurus.plus/related/roisterous/unflappable
Roisterous & Unflappable. N.p., 2016. Web. 01 Aug. 2026. <https://thesaurus.plus/related/roisterous/unflappable>.
Unflappable or Roisterous. 2016. Accessed August 01, 2026. https://thesaurus.plus/related/roisterous/unflappable.
Google Ngram Viewer shows how "roisterous" and "unflappable" have occurred on timeline