Robustious and Unflappable
Opposite meaning words
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
Unflappable is an antonym for robustious.
Unflappable
Cite this Source
Unflappable and Robustious. (2016). Retrieved 2026, August 14, from https://thesaurus.plus/related/robustious/unflappable
Robustious & Unflappable. N.p., 2016. Web. 14 Aug. 2026. <https://thesaurus.plus/related/robustious/unflappable>.
Unflappable or Robustious. 2016. Accessed August 14, 2026. https://thesaurus.plus/related/robustious/unflappable.
Google Ngram Viewer shows how "robustious" and "unflappable" have occurred on timeline