Sluggish and Unflagging
Opposite meaning words
Sluggish
Sluggish adjective - Moving or proceeding at less than the normal, desirable, or required speed.
Unflagging is an antonym for sluggish.
Nearby Words: sluggishness, sluggishly
Unflagging
Unflagging adjective - Showing no signs of weariness even after long hard effort.
Usage example: being rewarded for the unflagging zeal with which she led the fund-raising campaign
Sluggish is an antonym for unflagging.
Cite this Source
Unflagging and Sluggish. (2016). Retrieved 2026, August 13, from https://thesaurus.plus/related/sluggish/unflagging
Sluggish & Unflagging. N.p., 2016. Web. 13 Aug. 2026. <https://thesaurus.plus/related/sluggish/unflagging>.
Unflagging or Sluggish. 2016. Accessed August 13, 2026. https://thesaurus.plus/related/sluggish/unflagging.
Google Ngram Viewer shows how "sluggish" and "unflagging" have occurred on timeline