efficacy — the ability to produce a desired or intended result; effectiveness
Part of speech: NOUN
Definition: the ability to produce a desired or intended result; effectiveness
Pronunciation (IPA): /ˈefɪkəsi/
Example Sentences
- The efficacy of his study method was questionable - he fell asleep on his textbook every night.
- Scientists are studying the efficacy of chocolate as a cure for Monday blues.
- The efficacy of this medicine depends on proper dosage and timing.
efficacy
NOUN[/ˈefɪkəsi/]
the ability to produce a desired or intended result; effectiveness

Doctor showing medicine's effectiveness

Tracy proves the efficacy of making lacy fabric sturdy!
Got the picture? Now let's practice.
🎤Pronunciation
🌳Etymology
Origin
From Latin 'efficacia' meaning 'efficacy' or 'efficiency', derived from 'efficax' (effective, powerful) which comes from 'efficere' meaning 'to work out' or 'to accomplish'.
Breakdown
ef- (out) + -fic (do, make) + -acy (quality or state of) = efficacy
🎵Rhyme
🔗Collocations
📝Examples
“The efficacy of his study method was questionable - he fell asleep on his textbook every night.”
“Scientists are studying the efficacy of chocolate as a cure for Monday blues.”
“The efficacy of this medicine depends on proper dosage and timing.”
“Researchers questioned the efficacy of the traditional treatment method.”
📚Related Words
Synonyms
Antonyms
Related
Want to master 19,000+ words?
Sign up free for flashcards & quizzes.