Word · CEFR B2 · Frequency #7076
ineffective
无效的；不起作用的
核心释义
not producing the intended result or having the desired effect
- 1.
没有预期效果的；无效的；无用的。
Not having the desired effect; ineffectual; otiose.
- 2.
未产生预期效果的
not producing an intended effect
- 3.
缺乏能力；不称职或不够格的。
Lacking in ability; incompetent or inadequate.
- 4.
缺乏力量或效力的
lacking in power or forcefulness
- 5.
缺乏有效执行能力或技能的；不称职的
lacking the ability or skill to perform effectively; inadequate
无能的；不胜任的；软弱无力的；缺乏魄力的；没有预期效果的；无效的；无用的。；未产生预期效果的；缺乏能力；不称职或不够格的。
用法In use
The new medicine proved ineffective against the virus.
用法提示：作表语，表示某事物无效
Her attempts to negotiate were ineffective because she lacked authority.
用法提示：作表语，描述行为未达预期效果
The ineffective heating system left the office cold all winter.
用法提示：作定语，修饰名词，表示不起作用
an ineffective teacher
ineffective legislation
an ineffective administration
ineffective in doing sth
相关词与表达Connections
搭配Collocations
- proved ineffective
- 被证明无效
- The new policy proved ineffective in reducing crime.这项新政策在减少犯罪方面被证明无效。
- rendered ineffective
- 使无效
- The medication was rendered ineffective by the heat.这种药物因高温而失效。
- ineffective strategy
- 无效的策略
- We need to abandon this ineffective strategy.我们需要放弃这个无效的策略。
- ineffective treatment
- 无效的治疗
- The patient was given an ineffective treatment for his condition.患者接受了对其病情无效的治疗。
- ineffective leadership
学习提示Learner notes
记忆技巧Memory Tip
无效的：in（不）+ effective（有效），合起来就是没效果。
语境与语域Context & Register
通常用于正式或非正式场合，形容方法、措施等未达到预期效果，常见于工作、学习及政策讨论中。
发音与拼写Pronunciation & Spelling
Words ending in -ective (effective, defective, infective, collective) rhyme with ineffective, sharing the stressed vowel /ɛ/ and ending /ktɪv/. Words beginning with in- (inefficient, inactive) are useful lookalikes but do not rhyme; note the different vowel sounds /ɪˈfɪʃ/ and /ˈæk/.
用法优先级Usage priority
Collins 词频等级为 1，建议结合例句记忆，而不是只背中文释义。
Dictionary facts from DICTIONARY_API_DEV, ECDICT, WIKTIONARY.