Word · Frequency #21836
efficacious
有效；灵验
核心释义
able to produce the intended effect; effective
- 1.
具有产生预期效果的能力的特质
marked by qualities giving the power to produce an intended effect; -Aldous Huxley
- 2.
产生或能够产生预期结果或具有显著效果
producing or capable of producing an intended result or having a striking effect; -LewisMumford
具有产生预期效果的能力的特质；产生或能够产生预期结果或具有显著效果；有效的；灵验的
用法In use
The herbal tea proved efficacious in relieving my headache.
用法提示：efficacious 是形容词，表示‘有效的’，在此作表语，说明草药茶能产生预期效果。
Doctors are still looking for an efficacious treatment for this rare condition.
用法提示：efficacious 作定语修饰 treatment，意为‘能产生预期疗效的’。
This simple method is more efficacious than the expensive one we tried before.
用法提示：efficacious 用于比较级，强调产生预期结果的能力更强。
written propaganda is less efficacious than the habits and prejudices...of the readers
the medicine is efficacious in stopping a cough
an efficacious law
相关词与表达Connections
搭配Collocations
- highly efficacious
- 非常有效的；高效能的
- The new drug has been highly efficacious in treating malaria.这种新药在治疗疟疾方面非常有效。
- prove efficacious
- 证明有效；见效
- The new strategy proved efficacious in boosting sales.新策略被证明能有效提升销售额。
- efficacious remedy
- 有效的疗法；灵验的疗法
- This herbal tea is an efficacious remedy for a mild cough.这种草药茶是治疗轻微咳嗽的有效方法。
- efficacious means
- 有效手段
- Regular exercise is an efficacious means of relieving stress.经常锻炼是缓解压力的有效手段。
学习提示Learner notes
记忆技巧Memory Tip
efficacious 像 effective 的兄弟，-acious 表示“多”；想到药效多多、灵验有效。
语境与语域Context & Register
语域：formal 常见场景：formal writing、medical or scientific discourse、legal or administrative text 该词比较正式，多用于书面语或正式场合，尤其在医学、学术或法律类文本中比较常见；日常口语通常用 effective 或 works 来表达。
发音与拼写Pronunciation & Spelling
以 -acious 结尾的词（spacious、gracious、tenacious、voracious）与 efficacious 押韵，都读 /eɪʃəs/。注意 -icious 结尾的词（suspicious、delicious）拼写相似，但读 /ɪʃəs/，并不押韵。
Dictionary facts from ECDICT, WIKTIONARY.