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efficacy

efficacy

41 7.4
The ability to produce the wanted result
  • noun
  • /ˈɛfɪkəsi/
  • Formal
translation icon : eficacia
  • It can affect the efficacy of vaccines and other medicines.
  • high efficacy
  • safety and efficacy
  • determine the efficacy

These drugs were tested for efficacy and schizophrenia.

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Examples

  • And the Toyota to Camry is often seen as the gold standard of cost efficacy in cars.

  • We promote resilience through the development of self efficacy and empowerment.

  • Political efficacy is the idea that your voice matters in politics and that you can bring about change in politics.

  • We have one study that speaks to the efficacy of that for brain health.

  • Previous research has suggested that teachers with high efficacy believe that all students can learn.

    Academic text (2011)
  • Never doubt for one instant, Foster, the efficacy of prayer.

  • I think it's known that the efficacy of placebos varies a lot.

  • We hope to have a synthetic antibody serum with strong efficacy in a few days.

    Fiction book (1993)
  • So it essentially boosts the efficacy of the belief that they're going to heal.

  • The study confirmed the efficacy of the new drug in treating the disease.

Synonyms

effectiveness
vsefficacy
140 3.5

The ability to make something work as planned

stresses actual real-world success rather than theoretical ability
potency
vsefficacy
  • Specialized
13 6.3

Strength of a drug or chemical to produce an effect

refers to general ability to produce results regardless of strength or physical action
efficaciousness
vsefficacy
  • Formal
8.8

The ability of something to produce the result you want

is the more common standard term used for this concept
effectivity
vsefficacy
8.2

Ability to produce the wanted result

is the usual abstract form emphasizing ability rather than strength
effectualness
vsefficacy
8.2

The ability to get the result you want

is similar but used less in formal technical language
effectuality
vsefficacy
9.1

Ability to produce the wanted result

focuses on general ability rather than specific measured outcome

Antonyms

Not able to produce the result you want

1 8.7

Unable to produce the wanted result

How Effective

potency
  • Specialized
13 6.3
efficacy
  • Formal
41 7.4
effectiveness
140 3.5

Surface Forms

efficacy singular
efficacies plural

Etymology

Efficacy comes from the Latin word efficere, which means 'to bring about' or 'to do', and it shares the same root as the common words effect and effective. So, efficacy is the power or ability of something to produce the result you want.