inefficaciousadj.

英 ,ɪnefɪ'keɪʃəs | 美

中文adj. 无用的；无效果的

词根词源

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

关键词

inefficacious