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Definitions

ineffective

[in-i-fek-tiv] / ˌɪn ɪˈfɛk tɪv /
ADJECTIVE
useless
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 not effective 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.

Maybe that’s true — but it doesn’t mean it’s rhetorically ineffective.

From MarketWatch • Apr. 2, 2026

Hiding under a desk would have been ineffective, but it broke up the school routine.

From The Wall Street Journal • Mar. 13, 2026

Hurt by turnovers, an ineffective full-court press and a failure to hustle back, Sylmar gave up 14 consecutive baskets on layups and found itself trailing 77-56 early in the fourth quarter.

From Los Angeles Times • Mar. 13, 2026

On rare occasions, the opposition may deploy a unique defensive tactic from corners and catch the attacking side off-guard, making their preparation ineffective.

From BBC • Mar. 8, 2026

Not only did the mesmer prove ineffective, but the mysterious pair seemed to find it amusing.

From "Artemis Fowl" by Eoin Colfer

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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