effectual
effectual — 形容詞
- effectualpositive
- more effectualcomparative
- most effectualsuperlative
1. Describes a method, action, or thing that successfully brings about the result i
奏效的
能成功達到預期效果的
Describes a method, action, or thing that successfully brings about the result it was intended to achieve.
The new medicine proved effectual, and Kwame’s fever went down within hours.
這種新藥證明是奏效的，Kwame 的發燒在幾小時內就退了。
proved effectual — linking verb + adjective pattern
The police took effectual action, stopping the thief before he could reach the door.
警方採取了奏效的行動，在小偷跑到門口之前就將他制服。
effectual + noun (attributive use)
An effectual communication system helped the two design teams finish the project on time.
奏效的溝通系統讓兩個設計團隊能按時完成專案。
The manager’s cost-cutting plan was not effectual, so the firm looked to save money elsewhere.
經理的減低成本計畫並不奏效，所以公司另想辦法在別處省錢。
The new safety rules have been effectual in reducing injuries at the factory this year.
新的安全規定今年在減少工廠傷害方面證明是奏效的。
- effective
Much more common and broader in meaning; can describe people, actions, or things
- efficacious
Very formal, mostly used in medical or technical writing; stronger emphasis on proven power
- productive
Focuses on output or yield rather than whether the specific intended result was achieved
- ineffectual
Direct opposite; failing to produce the intended result
- ineffective
More common antonym; not producing the desired effect
- futile
Stronger; pointless because success is impossible
文法句型
be effectual
effectual + noun
effectual in + noun/gerund
用法筆記
Frequently appears in formal writing (reports, evaluations, legal texts) rather than everyday conversation. The much more common word “effective” covers most of the same ground; choose “effectual” when you want to emphasise that the intended outcome was actually reached, not just that the action had a strong impact.