This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

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adj. Insufficient to produce a desired effect: an ineffectual effort to block the legislation.

adj. Useless; worthless: an ineffectual treatment for cancer.

adj. Lacking forcefulness or effectiveness; weak: an ineffectual ruler.

adj. unable or insufficient to produce effect; futile

adj. worthless

adj. weak; lacking forcefulness

adj. Not producing the proper effect; without effect; inefficient; weak; useless; futile; unavailing

Not effectual; not producing or not able to produce the desired effect; of no efficacy; inefficient: as, an ineffectual remedy.

Synonyms Fruitless, Unavailing, etc. See useless.

adj. lacking in power or forcefulness

adj. producing no result or effect

adj. not producing an intended effect

"Walter Bassett broke out in ineffectual protest, but was swiftly silenced by the threat of a lunacy commission."

impotent    useless    unproductive    toothless   

effective    impressive    effectual   

ineffectually    ineffectualness    ineffectuality   

fruitless    futile    inefficient    unavailing    inefficacious    vain    useless    weak    ineffective    unproductive   

intellectual   

futile    ineffective    unavailing    pointless    impotent    useless    hopeless    powerless    abortive    feeble