CEFR C1

efficacious

adjective

Meaning

Producing the desired or intended result; effective.

Examples

The new vaccine proved highly efficacious in preventing the spread of the virus.
For the treatment to be truly efficacious, patients must follow the dosage instructions carefully.

Synonyms: effective, potent, successful, operative

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efficacious (C1)

adjective

Pronunciation: /ˌɛfɪˈkeɪʃəs/

Definition

Producing the desired or intended result; effective.

Examples

The new vaccine proved highly efficacious in preventing the spread of the virus.
For the treatment to be truly efficacious, patients must follow the dosage instructions carefully.
She sought an efficacious solution to the complex problem, one that would yield lasting results.

Synonyms of efficacious

Words with a similar meaning to efficacious:

Antonyms of efficacious

Words with the opposite meaning to efficacious:

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