How to Pronounce "efficacious"
word
ˌɛfəˈkeɪʃəs
ef-uh-KAY-shuhs
ˌɛfɪkˈeɪʃəs
ef-ih-KAY-shuhs
Definition
Producing the intended result; effective, especially used for things like medicines, treatments, or methods.
IPA Transcription
American English
ˌɛfəˈkeɪʃəs
British English
ˌɛfɪkˈeɪʃəs
Simplified Pronunciation
US
ef-uh-KAY-shuhs
UK
ef-ih-KAY-shuhs
Listen in Context
This medicine is very efficacious against the flu.
The new cleaning product proved to be efficacious.
Doctors recommend efficacious treatments for serious diseases.
Studies show this vaccine is highly efficacious in preventing infection.