Synonyms and Antonyms of efficacious
- Taking a cookie break while studying is one of the most efficacious ways of rejuvenating the mind that I have ever discovered.
Synonym Discussion of efficacious
- an effective rebuttal
- the measures to stop the pilfering proved effectual
- an efficient small car
- a detergent that is efficacious in removing grease
Seen and Heard
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