inefficacious
英 [,ɪnefɪ'keɪʃəs]美
adj. 无用的；无效果的
英文词源
inefficacious (adj.)
1650s, from in- (1) "not, opposite of" + efficacious. Related: Inefficaciously; inefficaciousness (1640s).
带inefficacious字词语
带inefficacious字成语
英 [,ɪnefɪ'keɪʃəs]美
adj. 无用的；无效果的
inefficacious (adj.)
1650s, from in- (1) "not, opposite of" + efficacious. Related: Inefficaciously; inefficaciousness (1640s).