Efficacy: meaning, definitions and examples

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efficacy

 

[ ˈɛfɪkəsi ]

Noun
Context #1 | Noun

medical treatment

The ability of a treatment or drug to produce the desired effect

Synonyms

effectiveness, efficiency, potency

Examples of usage

  • The efficacy of the new drug in treating cancer is still being studied.
  • The efficacy of the vaccine in preventing the spread of the virus is crucial.
Context #2 | Noun

general

The power to produce a desired result or effect

Synonyms

capability, effectiveness, power

Examples of usage

  • The efficacy of her leadership was evident in the company's success.
  • The efficacy of the marketing campaign led to increased sales.

Translations

Translations of the word "efficacy" in other languages:

🇵🇹 eficácia

🇮🇳 प्रभावशीलता

🇩🇪 Wirksamkeit

🇮🇩 efikasi

🇺🇦 ефективність

🇵🇱 skuteczność

🇯🇵 効能

🇫🇷 efficacité

🇪🇸 eficacia

🇹🇷 etkililik

🇰🇷 효능

🇸🇦 فعالية

🇨🇿 účinnost

🇸🇰 účinnosť

🇨🇳 效果

🇸🇮 učinkovitost

🇮🇸 virkni

🇰🇿 тиімділік

🇬🇪 ეფექტურობა

🇦🇿 effektivlik

🇲🇽 eficacia

Etymology

The word 'efficacy' comes from the Latin word 'efficacia', meaning 'ability to produce a desired effect'. It has been used in English since the 16th century, primarily in the context of effectiveness and power to produce results.

Word Frequency Rank

At #5,704 in frequency, this word belongs to advanced vocabulary. It's less common than core vocabulary but important for sophisticated expression.