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effective▼adjectiveantonym
idle▼adjectiverelated term
ineffective▼adjective
ineffectual▼adjective
inefficacious▼adjectiverelated term
inefficient▼adjectiverelated term
powerless▼adjectiverelated term
toothless▼adjectivesimilar term
unproductive▼adjectivesimilar term
useless▼adjectiverelated term
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