How do you pronounce efficacious?

Efficacious is pronounced ef-ih-KAY-shus (the syllable in capital letters is stressed).

What is another word for efficacious?

Synonyms for efficacious include effective, potent, productive.

Word meaning

Efficacious is a adjective that means successful in producing a desired or intended result; effective.

adjective · ef-ih-KAY-shus

Efficacious means successful in producing a desired or intended result; effective.

“The new treatment proved efficacious in trials.”

Say it out loud a few times: ef-ih-KAY-shus.
Write one sentence of your own using efficacious, about something that happened to you today.
Quiz yourself tomorrow, in three days, and next week. Spaced reviews are what make new words stick.

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stoic — enduring pain or hardship without complaining or showing feelings.
wit — mental sharpness and inventiveness; clever, amusing use of words.
placid — calm and peaceful, with little movement or activity.
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