Sample sentences for EFFICACY - verbalworkout.com

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Definition

effectiveness (the ability to produce a desired result)

The doctor weighed the efficacy of each treatment against potential side-effects.

efficacy = effectiveness

They held hearings to investigate concerns about the safety and efficacy of the vaccine.

efficacy = effectiveness

Man had marked this woman's sin by a scarlet letter, which had such potent and disastrous efficacy that no human sympathy could reach her, save it were sinful like herself.
Nathaniel Hawthorne -- The Scarlet Letter

efficacy = effectiveness

It soon proved its efficacy, and redeemed the leech's pledge.
Nathaniel Hawthorne -- The Scarlet Letter

efficacy = effectiveness

It was impossible to doubt that, whatever painful efficacy there might be in the secret sting of remorse, a deadlier venom had been infused into it by the hand that proffered relief.
Nathaniel Hawthorne -- The Scarlet Letter

efficacy = effectiveness

Souls, it is said, more souls than one, were brought to the truth by the efficacy of that sermon, and vowed within themselves to cherish a holy gratitude towards Mr. Dimmesdale throughout the long hereafter.
Nathaniel Hawthorne -- The Scarlet Letter

efficacy = effectiveness

The good woman no sooner felt the gold within her palm, than her temper began (such is the efficacy of that panacea) to be mollified.
Fielding, Henry -- The History of Tom Jones, a Foundling
I wonder who first discovered the efficacy of poetry in driving away love
Austen, Jane -- Pride and Prejudice
...the word acquires, through association, some of the same causal efficacy as the object.
Russell, Bertrand -- The Analysis of Mind
Like most savages they are firm believers in dreams, and in the power and efficacy of charms and amulets, or medicines as they term them.
Irving, Washington -- The Adventures of Captain Bonneville, U.S.A., in the Rocky Mountains and the far West
The very mysteriousness of such a cure made her the more confident of its efficacy.
Edith Wharton -- The Age of Innocence
Now, I say, is the time when the virtue that is in thee is ripe, and endowed with efficacy to work the good that is looked for from thee.
Miguel de Cervantes -- Don Quixote
Behold! there is a medicine, potent, as a wise physician has assured me, and almost divine in its efficacy.
Nathaniel Hawthorne -- Rappaccini's Daughter
I have confidence in the remedy I propose, and only ask you to permit me to assure you of its efficacy.
Alexandre Dumas -- The Count of Monte Cristo
But questions about the painlessness and efficacy of lethal injection were emerging.
Bryan Stevenson -- Just Mercy
Hivert openly cast some doubt on the efficacy of it.
Gustave Flaubert -- Madame Bovary
This total failure of the coal-hole discipline shook Silas's belief in the efficacy of punishment.
George Eliot -- Silas Marner
I have never believed in the efficacy of idealists-have you? and this is no age for impractical idealism.
Ayn Rand -- Atlas Shrugged
This apprehension had not been without efficacy in determining me to summary means.
Herman Melville -- Bartleby, the Scrivener: a Story of Wall Street
He gave the facts with flat efficacy.
Dan Brown -- Angels & Demons

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