inefficacious
inefficacious — 形容詞
- inefficaciouspositive
- more inefficaciouscomparative
- most inefficacioussuperlative
1. describes an action, method, or treatment that does not achieve the result it wa
無效的
無法達到預期效果的
describes an action, method, or treatment that does not achieve the result it was meant to achieve, often because it is not strong or suitable enough
Jiwoo's doctor decided that the first medicine was inefficacious and switched to a stronger treatment.
Jiwoo 的醫生判定第一種藥物無效，於是改用效力更強的療法。
was inefficacious — predicative use with a linking verb
The new teaching method proved inefficacious; students still struggled with basic reading skills.
新的教學方法證明無效；學生仍然在基本閱讀能力上遇到困難。
proved inefficacious — common formal pattern
Mert tried every possible cure for his flu, but each treatment remained stubbornly inefficacious.
Mert 試遍了每一種可能的感冒療法，但每種治療依然頑固地沒有效果。
The experimental vaccine was deemed inefficacious after the clinical trial showed no benefit.
該實驗性疫苗在臨床試驗顯示無益之後，被判定為無效。
Saira's manager rejected her proposal as inefficacious and asked for a completely different approach.
Saira 的主管認為她的提案無效而予以退回，並要求提出完全不同的方案。
- ineffective
much more common and less formal; the everyday alternative to inefficacious
- futile
suggests hopelessness and that effort is wasted; stronger emotional tone than inefficacious
- unproductive
focuses on the lack of results rather than a lack of power; common in workplace contexts
- efficacious
the direct formal antonym; equally rare and formal
- effective
the most common antonym across all registers
- productive
focuses on achieving good results; common in workplace and everyday contexts
文法句型
be inefficacious
prove inefficacious
remain inefficacious
deem someone/something inefficacious
用法筆記
This is a very formal word, most common in medical, legal, and academic writing. In everyday conversation, speakers typically use 'ineffective' or 'useless' instead. Frequently appears after linking verbs such as 'prove', 'remain', and 'be deemed'.