Robustious and Unstable
Opposite meaning words
Robustious
Robustious adjective - Being rough or noisy in a high-spirited way.
Unstable
Unstable adjective - Not being in or able to maintain a state of balance.
Robustious is an antonym for unstable.
Nearby Word: unstably
Cite this Source
Unstable and Robustious. (2016). Retrieved 2026, August 13, from https://thesaurus.plus/related/robustious/unstable
Robustious & Unstable. N.p., 2016. Web. 13 Aug. 2026. <https://thesaurus.plus/related/robustious/unstable>.
Unstable or Robustious. 2016. Accessed August 13, 2026. https://thesaurus.plus/related/robustious/unstable.
Google Ngram Viewer shows how "robustious" and "unstable" have occurred on timeline