Inefficacious
Inefficacious adjective - Producing no results.
Usage example: an inefficacious medication for a rare form of tuberculosis
Lost and inefficacious are semantically related. In some cases you can use "Lost" instead an adjective "Inefficacious".
Lost
Lost adjective - No longer possessed.
Inefficacious and lost are semantically related. Sometimes you can use "Inefficacious" instead an adjective "Lost".
Nearby Word: losing
Mutual synonyms
Cite this Source
Lost and Inefficacious. (2016). Retrieved 2026, August 14, from https://thesaurus.plus/related/inefficacious/lost
Inefficacious & Lost. N.p., 2016. Web. 14 Aug. 2026. <https://thesaurus.plus/related/inefficacious/lost>.
Lost or Inefficacious. 2016. Accessed August 14, 2026. https://thesaurus.plus/related/inefficacious/lost.
Google Ngram Viewer shows how "inefficacious" and "lost" have occurred on timeline