💊efficacious

adjective
/ˌɛfɪˈkeɪʃəs/

Meaning

Effective in producing the desired result.
Successful in producing a desired or intended result; effective.
Effective for a specific purpose

Example Sentences

The medicine proved efficacious in treating the disease.

The vaccine proved highly efficacious in preventing infections.

This medicine is highly efficacious in treating headaches.

Synonyms

effective, powerful, successful, efficient, useful, potent, Effective, Productive, Efficient
Entry 1
effective, powerful, successful, efficient, useful
Entry 2
effective, potent, successful
Entry 3
Effective, Productive, Efficient

Antonyms

ineffective, useless, powerless, inefficient, futile, Ineffective, Useless, Inefficient
Entry 1
ineffective, useless, powerless
Entry 2
ineffective, inefficient, futile
Entry 3
Ineffective, Useless, Inefficient

Collocations

efficacious remedy, efficacious treatment, highly efficacious, prove efficacious

Related Vocabularies

capable of being moved; not fixed in position
an organization that does not aim to make a profit, often serving a social or charitable purpose.
happening repeatedly over a long period of time; constant and uninterrupted
Equal in value, function, meaning, or effect.
Having or showing a tendency to tell people what to do in an autocratic way.
Showing great attention to detail; very careful and precise.

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