Imperturbable and Robustious
Opposite meaning words
Imperturbable
Imperturbable adjective - Not easily panicked or upset.
Robustious is an antonym for imperturbable.
Nearby Word: imperturbability
Robustious
Robustious adjective - Being rough or noisy in a high-spirited way.
Usage example: his buddies sent him off to the navy with many robustious and hearty toasts
Imperturbable is an antonym for robustious.
Cite this Source
Robustious and Imperturbable. (2016). Retrieved 2026, August 14, from https://thesaurus.plus/related/imperturbable/robustious
Imperturbable & Robustious. N.p., 2016. Web. 14 Aug. 2026. <https://thesaurus.plus/related/imperturbable/robustious>.
Robustious or Imperturbable. 2016. Accessed August 14, 2026. https://thesaurus.plus/related/imperturbable/robustious.
Google Ngram Viewer shows how "imperturbable" and "robustious" have occurred on timeline