inefficacious
英式音标：inefficacious怎么读
美式音标：inefficacious怎么读
近义词： worthless,fruitless
inefficacious词义
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adj. 无用的；无效果的
inefficacious英文词源
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- inefficacious (adj.)
- 1650s, from in- (1) "not, opposite of" + efficacious. Related: Inefficaciously; inefficaciousness (1640s).