单词	efficacious
释义	efficaciousef‧fi‧ca‧cious /ˌefəˈkeɪʃəs◂/ adjective formal Word Origin WORD ORIGINefficacious Origin: 1500-1600 Latin efficax, from efficere; ➔ EFFECT1 Examples EXAMPLES FROM OTHER DICTIONARIES More efficacious treatments may soon be available. EXAMPLES FROM THE CORPUS Areas where safeguards developed against the backdrop of a different type of decision-making may be more efficacious and apposite. He sees the present as the open door to an efficacious future. If we did, we would be forced to choose between enormous guilt and efficacious action. On seeing the Muybridge article he must immediately have been convinced that photography was the most efficacious means of advancing his researches. Some found bathing the patient in a bath of nitric acid to be efficacious! The cedar lining that once protected fine cigars from deteriorating is equally efficacious at preserving cardboard rectangles from insect damage. This suggests that improving access to dietitians might be more efficacious than other changes. This, as almost always, proved efficacious. working in the way you intended SYN  effective:  an equally efficacious method of treatment
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