English > efficacious: 2 senses > adjective 2| Meaning | producing or capable of producing an intended result or having a striking effect. |
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| Example | "an efficacious law" |
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| Synonyms | effective, effectual |
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| Attribute of | effectiveness, effectivity, effectualness, effectuality | Power to be effective |
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| Narrower | hard-hitting, trenchant | Characterized by or full of force and vigor |
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| impelling | markedly effective as if by emotional pressure |
| impressive, telling | producing a strong effect |
| rough-and-ready | crude but effective for the purpose at hand |
| See also | efficacious | marked by qualities giving the power to produce an intended effect |
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| efficient | effective without wasting time or effort or expense |
| potent, strong, stiff | Having a strong physiological or chemical effect |
| powerful | Having great power or force or potency or effect |
| useful, utile | Of use or service |
| Opposite | ineffective, uneffective, ineffectual | not producing an intended effect |
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| Spanish | efectivo, eficaz |
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| Catalan | eficaç |
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| Nouns | efficacy, efficaciousness | capacity or power to produce a desired effect |
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