Efficacies
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Efficacious(n.)
- Possessing the quality of being effective; productive of, or powerful to produce, the effect intended; as, an efficacious law.
Efficaciously
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Efficaciousness
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Efficacy(n.)
- Power to produce effects; operation or energy of an agent or force; production of the effect intended; as, the efficacy of medicine in counteracting disease; the efficacy of prayer.