Laborious and Nonoperating

Laborious

Laborious adjective - Involved in often constant activity.
Usage example: the volunteers have been commendably laborious in their cleanup of the beach

Nonoperating is an antonym for laborious.

Nonoperating

Nonoperating adjective - Not being in working order.

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