efficacious
英 [,ef?'ke???s]
美
助記提示
1. ef- "out" + fic- + -acy. 在這里取 out 的引申義：完成、結束(finish, end)之意。
2. meaning: 事情做完了，事情做結束了. => work out, accomplish.
3. => 引申為：事情做完、做結束后的效果。=> 效果、功效。
4. efficacy + 變 y 為 i 加 -ous.
英文詞源
- efficacious
- efficacious: see effect
- efficacious (adj.)
- "sure to have the desired effect" (often of medicines), 1520s, from Latin efficaci-, stem of efficax "effectual, powerful" (see efficacy) + -ous. Related: Efficaciously; efficaciousness.
雙語例句
- 1. They hope the new drug will prove especially efficacious in the relief of pain.
- 他們希望這種新藥能在緩解疼痛方面產生特效。
來自《權威詞典》
- 2. It occurs to me that example is always more efficacious than precept.
- 我想到身教重于言教.
來自《簡明英漢詞典》
- 3. Qingdao is a resort efficacious for a variety of bodily ills.
- 青島是一個對各種身體疾病都有療效的療養勝地.
來自《簡明英漢詞典》
- 4. This medicine is highly efficacious.
- 這藥很靈驗.
來自《現代漢英綜合大詞典》
- 5. Vaccination for smallpox is efficacious.
- 種牛痘防天花是有效的.
來自《現代英漢綜合大詞典》