Main entry: uneffective, ineffective, ineffectual
Definition: not producing an intended effect
Usage: an ineffective teacher; ineffective legislation
Main entry: ineffective, ineffectual, unable
Definition: lacking in power or forcefulness
Usage: an ineffectual ruler; like an unable phoenix in hot ashes
Main entry: futile, unavailing, otiose, ineffectual
Definition: producing no result or effect
Usage: a futile effort; the therapy was ineffectual; an otiose undertaking; an unavailing attempt