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Word of the Day Tuesday, June 9, 2026

efficacious

/ɪˈfɪkəs/ or /ɛfɪˈkeɪʃəs/ adjective · British & US
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What does efficacious mean?

adjective

Having a strong and beneficial effect; producing the intended or desired result. Efficacious treatments or remedies are those that are effective in curing or alleviating a condition.

Example

"The new medication proved to be efficacious in treating the patient's symptoms, and they were able to recover quickly."

Definition generated by AI and curated by RJS Tech Solutions LLP.

Synonyms for efficacious

Antonyms of efficacious

Rhymes with efficacious

Etymologically related