English / word
efficacious
adjective C2MEANING IN ENGLISH
Successful in producing a desired or intended result; effective.
In context
01
The vaccine proved highly efficacious in preventing infections.
02
This medicine is highly efficacious in treating headaches.
Synonyms
effective,potent,productive
Antonyms
ineffective,inefficacious,futile
Collocations
highly efficacious,prove efficacious,efficacious treatment