Efficacious is an adjective used to describe having the power to produce a desired result or effect. Effective as a means, measure, remedy, strategy, plan.


  1. Sometimes taking a break and focusing your mind on something else, can be a ‘efficacious’ way of finding the answer to your problems.
  2. Wearing glasses is in fact not an ‘efficacious’ way of looking after your eyesight.
  3. The treatment was ‘efficacious’ in diagnosing the illness.






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