GRE vocabulary
efficacious
effective in producing the intended result
In a sentence
Efficacious in a sentence
Here is an example sentence showing efficacious in a sentence.
The new vaccine proved highly efficacious in clinical trials.
Synonyms
effectivepotentproductive
Antonyms
Keep going
See all More GRE words starting with E
ebb
to gradually decline, recede, or diminish
ebullience
overflowing enthusiasm and liveliness
ebulliency
the quality of overflowing, bubbling enthusiasm
ebullient
overflowing with cheerful enthusiasm and high spirits
eccentric
deviating from conventional or accepted behavior in odd ways
echelon
a level or rank within an organization, profession, or society
eclectic
drawing from a wide and diverse range of sources or styles
eclipse
to deprive of importance or overshadow by being superior
Common questions
Questions about “efficacious”
Efficacious (adjective) means effective in producing the intended result
Here is efficacious used in an example sentence: "The new vaccine proved highly efficacious in clinical trials."
Common synonyms for efficacious include effective, potent, productive.
Antonyms of efficacious include ineffective, useless, futile.
Efficacious is a GRE-level vocabulary word worth knowing for the Verbal section.
Learn words the way the GRE tests them.
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