Thanks for using this online dictionary, we have been helping millions of people improve their use of the english language with its free online services. English definition of inefficacious is as below...

Supersede :: Supersede (v. t.) To make void, inefficacious, or useless, by superior power, or by coming in the place of; to set aside; to render unnecessary; to suspend; to stay..

Inefficaciously :: Inefficaciously (adv.) without efficacy or effect.

Inefficaciousness :: Inefficaciousness (n.) Want of effect, or of power to produce the effect; inefficacy..

Inefficient :: Inefficient (a.) Not efficient; not producing the effect intended or desired; inefficacious; as, inefficient means or measures..

Inefficacious :: Inefficacious (a.) Not efficacious; not having power to produce the effect desired; inadequate; incompetent; inefficient; impotent.

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