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not effective

ADJECTIVE

ineffective

Synonyms

STRONGEST

feeble fruitless futile impotent inadequate incompetent indecisive ineffectual inefficient inept limited null powerless unable unproductive unprofitable unsuccessful worthless

WEAK

abortive anticlimactic barren bootless defeasible emasculate epicene feckless forceless idle inefficacious inferior innocuous inoperative lame neutralized no-go nugatory paltry slack-spined spineless unavailable unavailing unfruitful vain void withered

Antonyms

STRONGEST

able adequate capable competent dexterous effective effectual efficient expert fit fruitful potent powerful productive profitable skillful strong successful sufficient useful valuable worthwhile worthy

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.

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not effective

Other witnesses testified over the past week that Meta knew the tools were not effective and even that they were "designed to fail."

From Barron's ● Aug. 26, 2026

And there were portable air conditioning units onboard, which he said were not effective.

From BBC ● Aug. 20, 2026

The EU also said Meta's tool to report the presence of children on Facebook or Instagram was "difficult to use and not effective, requiring up to seven clicks just to access the reporting form".

From Barron's ● Apr. 29, 2026

That’s not effective fraud protection — that’s a broken system that is wasting money and creating friction with customers and vendors.

From MarketWatch ● Apr. 22, 2026

“Or it’s not effective on egglets,” Jordie puts in.

From "Linked" by Gordon Korman

not effective

Example Sentences

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