how to pronounce efficacy


audio example by a male speaker

audio example by a female speaker

the above transcription of efficacy is a detailed (narrow) transcription according to the rules of the International Phonetic Association; you can find a description of each symbol by clicking the phoneme buttons in the secction below.

efficacy is pronounced in four syllables

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example pitch curve for pronunciation of efficacy


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video examples of efficacy pronunciation

An example use of efficacy in a speech by a native speaker of american english:

“… on the planet and its efficacy is …”

meanings of efficacy


  1. Degree of ability to produce a desired effect.
  2. Ability to produce a desired effect under ideal testing conditions.

efficacy frequency in english - C2 level of CEFR

the word efficacy occurs in english on average 2 times per one million words; this frequency warrants it to be in the study list for C2 level of language mastery according to CEFR, the Common European Framework of Reference.

topics efficacy can be related to

it is hard to perfectly classify words into specific topics since each word can have many context of its use, but our machine-learning models believe that efficacy can be often used in the following areas:

1) business and work;

2) communication, information, and media;

3) people, society, and culture;

words with pronunciation similar to efficacy


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