Aflutter and Unflappable

Aflutter

Aflutter adjective - Feeling or showing uncomfortable feelings of uncertainty.

Unflappable is an antonym for aflutter.

Unflappable

Unflappable adjective - Not easily panicked or upset.
Usage example: the unflappable teacher never even blinked when the wall map came crashing down

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