Thesaurus

inefficacious

adjective

Synonyms & Antonyms of inefficacious

1 not producing the desired result
  • his efforts to restore the neglected houseplant back to health were belated and sadly inefficacious

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The first known use of inefficacious was in 1658

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“Inefficacious.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/inefficacious. Accessed 21 Sep. 2020.

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