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Synonyms

inefficacy

American  
[in-ef-i-kuh-see] / ɪnˈɛf ɪ kə si /

noun

  1. lack of power or capacity to produce the desired effect.


Etymology

Origin of inefficacy

From the Late Latin word inefficācia, dating back to 1605–15. See in- 3, efficacy

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.

See Examples For:

The process is often triggered by post-approval studies showing inefficacy, according to Harvard Law professor I. Glenn Cohen.

From Reuters Mar. 23, 2023

He seemed to think he could figure this out, make the kind of adjustment he has made so many times before in a career defined by his ability to stave off long stretches of inefficacy.

From Washington Post Oct. 7, 2022

Phil Jackson took over the team the next year, ushering in a new period of inefficacy for the team.

From New York Times Oct. 20, 2021

If they fail to account for the complexities of bots, they may pass laws at great risk of failure due to ambiguity and inefficacy.

From Slate Aug. 9, 2018

These men are all engaged in organizing the workingmen's vote with extraordinary efficacy in Europe, and with extraordinary inefficacy in the United States.

From Twentieth Century Socialism What It Is Not; What It Is: How It May Come by Edmond Kelly

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