ineffective

.ini'fektiv

Collins 1

a. not producing an intended effect
s. lacking in power or forcefulness
s. lacking the ability or skill to perform effectively; inadequate

a. 无效的
[法] 失效的, 无效的, 效率低的

Collins 星级

7,076

BNC 频率

7,869

使用频率

ineffective 可以拆分为前缀 in-（表示否定）和词根 effective（有效的）。因此，整体意思是“不有效的”。

例句

1. The medication was ineffective in treating her cold.

这种药物对治疗她的感冒无效。

2. His efforts to fix the car were ineffective, so he called a mechanic.

他修车的努力没有效果，所以他叫了个修车工。

3. The training program was ineffective and did not improve our skills.

这个培训项目无效，没有提高我们的技能。