即そっ効こう性せい

noun, noun which may take the genitive case particle 'no'

immediate effectiveness; quick-acting

Describes something that produces results right away, such as a medicine, policy, or method.

• この薬くすりは即そっ効こう性せいがある。

  This medicine works immediately.

• 即そっ効こう性せいのある対たい策さくが必ひつ要ようだ。

  We need measures that take effect right away.