operative

重要な、決め手となる、効果のある

理解の鍵となる、または望む結果を生むために重要である。

やさしい英語で： Most important for understanding something, or producing the intended result.

• The operative word here is 'free'.
• He promised to try; 'try' is the operative word.
• Trust is the operative principle behind this agreement.

類義語： key, crucial, effective

よく使う表現： operative word, operative phrase, operative principle

作動する、有効な

作動している、使える状態にある、または現在有効である。

やさしい英語で： Working or ready to work; currently having an effect.

• The alarm is now operative.
• The new rules become operative next month.
• Engineers checked that all safety systems were fully operative.

類義語： working, operational, in force

反対語： inoperative

よく使う表現： fully operative, operative system, become operative

作用する、影響を及ぼす

実際に変化を起こしたり、物事の成り行きに影響したりする。

やさしい英語で： Actively producing a change or influencing what happens.

• Fear was the operative motive behind his decision.
• Several operative forces shaped the outcome.
• The study identifies the operative causes of this change.

類義語： active, effective

反対語： inactive

よく使う表現： operative force, operative motive, operative cause

作業員、職員

特定の仕事に雇われ、主に手作業や技能を使う作業をする人。

やさしい英語で： A person employed to do a particular job, often practical or skilled work.

• The factory needs more operatives.
• She works as a machine operative.
• Trained operatives check each part before packing it.

類義語： worker, employee

よく使う表現： machine operative, production operative, warehouse operative

工作員、諜報員

組織のために秘密で情報を集めたり、任務を実行したりする人。

やさしい英語で： A person who secretly collects information or carries out tasks for an organization.

• The operative used a false name.
• Two operatives followed the suspect through the city.
• The agency sent an experienced operative to investigate.

類義語： agent, spy

よく使う表現： undercover operative, intelligence operative, secret operative