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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.

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

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

This extraordinary stylistic range stems from Graham’s wish to make a lavish formal show of her epistemological turbulence, her poems’ provisional victories over their own inefficacy.

From The New Yorker • Mar. 23, 2015

Their inefficacy, indeed, may justly be cited in testimony; for what they extort is in all probability false, what they fail to extort is in all probability true.

From The New Conspiracy Against the Jesuits Detected and Briefly Exposed with a short account of their institute; and observations on the danger of systems of education independent of religion by Dallas, R. C. (Robert Charles)