Right Pronunciation of importanti names

Efficacy

Category
VARIOUS

Language
ENGLISH

Efficacy is the ability to perform a task to a satisfactory or expected degree. The word comes from the same roots as effectiveness, and it has often been used synonymously, although in pharmacology a distinction is now often made between efficacy and effectiveness.[1]

Wikipedia contributors, "Efficacy," Wikipedia, The Free Encyclopedia,

ABOUT THE ENGLISH LANGUAGE