Ineffective
Working
Working adjective - Being in effective operation.
Usage example: the only working coal mine in the area
Ineffective is an antonym for working.
Both words in one sentence
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High explosives which should liquefy corpses are ineffective because "they don't cause headshots," but there's more to using a body than just having a working brain.
Source: Literature / World War Z - Humorously, in Serpent Isle you pick up Selena, who is very transparently working for the bad guys and tries to lead you into a very ineffective and badly planned deathtrap.
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Four million years later, he had a second one when he realized how utterly ineffective his campaign of violence had been, causing him to quit the Decepticons and become The Atoner, working with Rodimus and Ultra Magnus to try to undo some of the damage he'd inflicted.
Source: Heel Realization
Cite this Source
Working and Ineffective. (2016). Retrieved 2026, August 13, from https://thesaurus.plus/related/ineffective/working
Ineffective & Working. N.p., 2016. Web. 13 Aug. 2026. <https://thesaurus.plus/related/ineffective/working>.
Working or Ineffective. 2016. Accessed August 13, 2026. https://thesaurus.plus/related/ineffective/working.
Google Ngram Viewer shows how "ineffective" and "working" have occurred on timeline