ineffective
Americanadjective
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not effective; not producing results; ineffectual.
ineffective efforts; ineffective remedies.
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inefficient or incompetent; incapable.
an ineffective manager.
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lacking in artistic effect, as a literary work, theatrical production, or painting.
adjective
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having no effect
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incompetent or inefficient
Other Word Forms
Etymology
Origin of ineffective
Explanation
Use the adjective ineffective to describe something that doesn't work quite the way it's supposed to. You might complain about your ineffective guard dog, who wags his tail and licks everyone who comes to your house. When you're ineffective, you're unable to accomplish something you're trying to do. You might realize that you're an ineffective babysitter when you can't get the kids to go to bed. Ineffective comes from the Latin prefix in, "not, or opposite of," added to effective, whose Latin root is effectivus, "productive." When something's unproductive, inefficient, or incapable, it's ineffective.
Vocabulary lists containing ineffective
Florida's B.E.S.T. Common Prefixes: in-, im-, il-, ir-
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in-
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Novel Study: Hatchet
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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 platform also did not "adequately" stop the sale of counterfeit products because its mandatory "brand authorisation" system "proved ineffective and understaffed. Therefore, traders easily bypassed this", the EU found.
From Barron's ● Jul. 20, 2026
Although the resolution is constitutional, it has proved ineffective.
From The Wall Street Journal ● Jul. 14, 2026
Or you or me, Balogun was that ineffective.
From Los Angeles Times ● Jul. 7, 2026
"Weak governance, poor oversight, ineffective escalation, and underdeveloped leadership created the conditions in which patients were seriously harmed," the chair added.
From BBC ● Jun. 24, 2026
The full extent of the toll that has been taken by this largely ineffective program may never be known, for the results measured by the Illinois biologists are a minimum figure.
From "Silent Spring" by Rachel Carson
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
