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efficacies

NOUN

efficiency; productiveness

Synonyms

STRONGEST

adequacy competence effectiveness potency virtue

STRONG

ability capability capableness capacity effect efficaciousness energy force influence performance power strength success sufficiency use vigor weight

Antonyms

STRONGEST

inadequacy ineffectiveness

STRONG

enervation failure idleness impotence inability inactivity incapacity incompetence inefficiency lethargy powerlessness weakness

WEAK

inefficacy unproductiveness uselessness

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

For the next pandemic, if we have certain vaccines with starting efficacies, we can predict the minimum proportion we need to vaccinate to achieve vaccine-induced herd immunity.

From Scientific American • Apr. 6, 2023

Still, the vaccines, shown in clinical trials to have efficacies of up to 95% against symptomatic disease, have finally given the world the prospect of an escape from COVID-19’s long siege.

From Science Magazine • Feb. 16, 2021

Further tests would be needed to judge how much the 2P mutation contributes to the overall efficacies of the frontrunner vaccines.

From National Geographic • Dec. 31, 2020

Obsessed with holistic health, we are also susceptible to pitches about the mysterious efficacies of neurons and transmitters.

From Slate • Jan. 7, 2014

The benignant efficacies of Concealment," cries our Professor, "who shall speak or sing?

From Sartor Resartus: the life and opinions of Herr Teufelsdröckh by Carlyle, Thomas