相關單詞同義詞effectiveness, virtue, 近義詞 ability 能力, competence 能力, capacity 容量, proficiency 熟練, technique 技術, utility 效用, virtue 美德, effectiveness 有效性, efficiency 效率, usefulness 有用, worth 價值, value 價值, efficaciousness 有效反義詞inefficacy, 無效力臨近詞efficiency, efficacious, efficacytest, efficacy test, efficacy ratio, efficacy trial, efficacy index, efficacy of law, efficacy modulus, efficacy testing, efficacy function, efficacy research相似詞effervesce, effervescent, effete, efficacious, efficiency, efficiency apartment, efficiency room, efficient, 返回 efficacy