999英语网 单词

inefficacious的意思

inefficacious

英 [,nef'kes] 美
  • adj. 无用的;无效果的

inefficacious

英文词源


inefficacious (adj.)
1650s, from in- (1) "not, opposite of" + efficacious. Related: Inefficaciously; inefficaciousness (1640s).