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 efficacy is as below...

Insignificance :: Insignificance (n.) Want of force or effect; unimportance; pettiness; inefficacy; as, the insignificance of human art..

Null :: Null (a.) Of no legal or binding force or validity; of no efficacy; invalid; void; nugatory; useless.

Force :: Force (n.) Validity; efficacy.

Nullify :: Nullify (a.) To make void; to render invalid; to deprive of legal force or efficacy.

Prevailment :: Prevailment (n.) Prevalence; superior influence; efficacy.

Nullity :: Nullity (n.) The quality or state of being null; nothingness; want of efficacy or force.

Unsacrament :: Unsacrament (v. t.) To deprive of sacramental character or efficacy; as, to unsacrament the rite of baptism..

Charm :: Charm (n.) Anything worn for its supposed efficacy to the wearer in averting ill or securing good fortune.

Vigor :: Vigor (n.) Strength; efficacy; potency.

Virtuous :: Virtuous (a.) Having power or efficacy; powerfully operative; efficacious; potent.

Virtueless :: Virtueless (a.) Destitute of virtue; without efficacy or operating qualities; powerless.

Inefficiency :: Inefficiency (n.) The quality of being inefficient; want of power or energy sufficient; want of power or energy sufficient for the desired effect; inefficacy; incapacity; as, he was discharged from his position for inefficiency..

Inefficacy :: Inefficacy (n.) Want of power to produce the desired or proper effect; inefficiency; ineffectualness; futility; uselessness; fruitlessness; as, the inefficacy of medicines or means..

Sacramentarian :: Sacramentarian (n.) One who holds extreme opinions regarding the efficacy of sacraments.

Virtue :: Virtue (n.) Active quality or power; capacity or power adequate to the production of a given effect; energy; strength; potency; efficacy; as, the virtue of a medicine..

Potentness :: Potentness (n.) The quality or state of being potent; powerfulness; potency; efficacy.

Strong :: Strong (superl.) Having virtues of great efficacy; or, having a particular quality in a great degree; as, a strong powder or tincture; a strong decoction; strong tea or coffee..

Infringe :: Infringe (v. t.) To hinder; to destroy; as, to infringe efficacy; to infringe delight or power..

Magistery :: Magistery (n.) Mastery; powerful medical influence; renowned efficacy; a sovereign remedy.

Prevalent :: Prevalent (a.) Gaining advantage or superiority; having superior force, influence, or efficacy; prevailing; predominant; successful; victorious..

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