efficacious
Usage
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.
Though a seemingly striking outcome, the vaccine wasn’t as efficacious as some investors had hoped.
From MarketWatch ● Oct. 23, 2026
“She shows up, ‘This is what I believe,’ and maybe it’s not politically efficacious to believe this right now, or to say ‘I believe it’ … but she does.”
From Los Angeles Times ● Jul. 7, 2026
Younger consumers want modernized packaging that looks differentiated, efficacious body care and transparent, cleaner ingredients.
From The Wall Street Journal ● Jun. 12, 2026
She starts by noting that the Voting Rights Act is, or was. one of the most consequential, efficacious, amply justified exercises of federal legislative power in the nation’s history.
From Slate ● Apr. 30, 2026
In each case, intervention, no matter how worthless, can appear to be quite efficacious.
From "Innumeracy: Mathematical Illiteracy and Its Consequences" by John Allen Paulos
Vocabulary lists containing efficacious
"The Witch Boy" by Molly Knox Ostertag
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George Washington's Farewell Address (1796)
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The Prince
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