1. (adj) ineffective, uneffective, ineffectual
not producing an intended effect
Synonyms: unavailing, otiose, unable, inefficient, uneffective, ineffective, futile, ineffectual
Antonyms: impelling, trenchant, telling, rough-and-ready, effectual, competent, impressive, effective, hard-hitting, potent, efficacious, strong, stiff
2. (adj) ineffective, ineffectual, unable
lacking in power or forcefulness
Synonyms: unavailing, otiose, unable, inefficient, uneffective, ineffective, futile, unable(p), ineffectual
Antonyms: hard-hitting, potent, strong, competent, rough-and-ready, effectual, telling, impelling, impressive, trenchant, efficacious, effective, stiff
3. (adj) ineffective, inefficient
lacking the ability or skill to perform effectively; inadequate
Synonyms: unable, ineffective, ineffectual, inefficient, uneffective
Antonyms: telling, hard-hitting, effective, potent, competent, effectual, impressive, stiff, impelling, rough-and-ready, strong, trenchant, efficacious
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Synonyms for ineffective 
