Antonyms of efficacious from BoostVocab

Smart Search Learn a New Word

efficacious

/,ɛfə'keɪʃəs/

Synonyms of efficacious Antonyms of efficacious Examples of efficacious Usage of efficacious Parts of efficacious Definition that contains efficacious Words sounding like efficacious Explanation of efficacious

adjective
producing or capable of producing an intended result or having a striking effect
- + New List
"an efficacious law"

Similar:

effective effectual rough-and-ready impressive telling trenchant impelling hard-hitting
adjective
marked by qualities giving the power to produce an intended effect
- + New List
"written propaganda is less efficacious than the habits and prejudices...of the readers" "the medicine is efficacious in stopping a cough"

Similar:

effective

Opposite:

inefficacious

Antonyms of efficacious