Inefficacious
Inefficacious adjective - Producing no results.
Usage example: an inefficacious medication for a rare form of tuberculosis
Idle and inefficacious are semantically related. in ineffectual topic. In some cases you can use "Idle" instead an adjective "Inefficacious".
Idle
Idle adjective - Not being in a state of use, activity, or employment.
Inefficacious and idle are semantically related. Sometimes you can use "Inefficacious" instead an adjective "Idle".
Mutual synonyms
Related pairs
- empty and inefficacious
- empty and idle
- hollow and inefficacious
- hollow and idle
- worthless and inefficacious
- worthless and idle
- inoperative and inefficacious
- inoperative and idle
- ineffective and inefficacious
- ineffective and idle
- vain and inefficacious
- vain and idle
- useless and inefficacious
- useless and idle
Cite this Source
Idle and Inefficacious. (2016). Retrieved 2026, August 14, from https://thesaurus.plus/related/inefficacious/idle
Inefficacious & Idle. N.p., 2016. Web. 14 Aug. 2026. <https://thesaurus.plus/related/inefficacious/idle>.
Idle or Inefficacious. 2016. Accessed August 14, 2026. https://thesaurus.plus/related/inefficacious/idle.
Google Ngram Viewer shows how "inefficacious" and "idle" have occurred on timeline