Meaning of the word efficacious in English

What does efficacious mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

efficacious

US /ˌef.əˈkeɪ.ʃəs/
UK /ˌef.ɪˈkeɪ.ʃəs/

Adjective

producing the desired or intended result; effective

Example:
The new medicine proved to be highly efficacious in treating the disease.
Her advice was highly efficacious in helping me solve the problem.