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effective (B1)

カタカナ: イフェクティブ

IPA: /ɪˈfɛktɪv/

Producing a desired or intended result.

意味: 望ましい結果や意図した結果を生み出すこと。

The new marketing campaign was highly effective in increasing sales. — The new marketing campaign was highly effective in increasing sales.
We need to find a more effective way to manage our time. — We need to find a more effective way to manage our time.
Her speech was surprisingly effective in persuading the audience. — Her speech was surprisingly effective in persuading the audience.

Japanese translations of Effective:

effective in (prepositional phrase): Successful in achieving a specific goal or result. — "The medication proved effective in relieving pain."
effective at (prepositional phrase): Skilled or competent in doing something. — "She is very effective at managing complex projects."
effective against (prepositional phrase): Having the power to produce a desired result when used on or in opposition to something. — "This pesticide is effective against a wide range of insects."