Quantcast
Merriam-Webster Logo
  • Dictionary
  • Thesaurus
  • Scrabble
  • Spanish Central
  • Learner's Dictionary

Thesaurus

efficacious

adjective

Synonyms and Antonyms of efficacious




Learn More about efficacious


Seen and Heard

What made you want to look up efficacious? Please tell us where you read or heard it (including the quote, if possible).

WORD OF THE DAY

to criticize in a loud and angry way

Get Word of the Day daily email!