[ˌefi'keiʃəs]
efficacious
a. 有效的,灵验的

词形变化:

名词:efficaciousness 副词:efficaciously

英英解释:

形容词 efficacious:

  1. marked by qualities giving the power to produce an intended effect
  2. producing or capable of producing an intended result or having a striking effect
  3. 同义词:effective, effectual