efficacy
意味
- (…に対する,における)効きめ,効力《+against(in)+名》
語源
英語の原文（Wiktionary）
From Old French efficace, from Late Latin efficācia (“efficacy”) (whence -acy), from efficāx (“efficacious”); see efficacious.
辞書順で近い単語
effective effeminate effervescent efficiency efficient effort