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Showing results for inefficacious. Search instead for inefficacies.
Synonyms

inefficacious

American  
[in-ef-i-key-shuhs] / ˌɪn ɛf ɪˈkeɪ ʃəs /

adjective

  1. not able to produce the desired effect; ineffective.


inefficacious British  
/ ˌɪnɛfɪˈkæsɪtɪ, ˌɪnɛfɪˈkeɪʃəs, ɪnˈɛfɪkəsɪ /

adjective

  1. failing to produce the desired effect

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Other Word Forms

  • inefficaciously adverb
  • inefficaciousness noun
  • inefficacity noun
  • inefficacy noun

Etymology

Origin of inefficacious

First recorded in 1650–60; in- 3 + efficacious

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Remedies for the starling plague were suggested, some facetious, some earnest, all equally inefficacious.

From Time Magazine Archive

Most nostrums hit at only one of the causes and so are frequently inefficacious.

From Time Magazine Archive

Failing in its usual effect, the medicine was no longer continued; but every thing that was tried proved equally inefficacious, and he did not long survive.

From An Account of the Foxglove and some of its Medical Uses With Practical Remarks on Dropsy and Other Diseases by Withering, William

It is, at least, quite certain that other means will prove inefficacious, if this be not superadded.

From Three Prize Essays on American Slavery by Baldwin, A.C.

He commenced the sentence with a dignity, and ended it with a familiarity equally inefficacious.

From Gabriel Conroy by Harte, Bert