| 单词 | efficacious |
| 释义 | efficacious —efficaciously, adv. —efficaciousness, n. /ef'i kay"sheuhs/, adj. capable of having the desired result or effect; effective as a means, measure, remedy, etc.: The medicine is efficacious in stopping a cough. [1520-30; < L efficaci- (s. of efficax) effectual. See EFFICIENT, -ACIOUS] |
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