English English Dictionary
- producing the intended result in English:
1. 
efficacious
The new drug proved really efficacious in the relief of pain.
even if heard only once it can be efficacious
English word "producing the intended result"(efficacious) occurs in sets:
English Common Adjectivesother words beginning with "P"
process in Englishproduce in English
producer in English
product in English
profession in English
professional in English
