EFFICACY (Noun)

Meaning- ability to produce desired result or effects.

Mnemonic trick- The word efficacy sounds similar to efficiency. Efficiency is defined as the ratio of output to input. We can understand that efficiency of a machine is basically the power of a machine to produce desired result. Therefore, efficacy means ability to produce desired result or effects.

Synonym- EFFECTIVENESS, EFFICACIOUSNESS, PRODUCTIVENESS, EFFICIENCY

Uses-

•          They recently ran a series of tests to measure the efficacy of the drug.
•          Medical students confirm the efficacy of healthier lifestyle.
•          Many of the treatments of the ancient world had high degrees of efficacy, all obtained without access to any modern knowledge or equipment.
•          Blood test may be needed periodically to monitor the treatment and efficacy.
•          The efficacy of the commodity is always a selling point.
•          Manager questioned the efficacy of machines.