Sluggish and Tireless

Sluggish

Sluggish adjective - Moving or proceeding at less than the normal, desirable, or required speed.

Tireless is an antonym for sluggish.

Nearby Words: sluggishness, sluggishly

Tireless

Tireless adjective - Showing no signs of weariness even after long hard effort.
Usage example: a tireless advocate for human rights

Sluggish is an antonym for tireless.

Nearby Word: tirelessly
Cite this Source
Tireless and Sluggish. (2016). Retrieved 2026, August 15, from https://thesaurus.plus/related/sluggish/tireless
Sluggish & Tireless. N.p., 2016. Web. 15 Aug. 2026. <https://thesaurus.plus/related/sluggish/tireless>.
Tireless or Sluggish. 2016. Accessed August 15, 2026. https://thesaurus.plus/related/sluggish/tireless.
Google Ngram Viewer shows how "sluggish" and "tireless" have occurred on timeline