効こう果か抜ばつ群ぐん

noun, na-adjective, noun which may take the genitive case particle 'no'

exceptionally effective; outstandingly effective

Used to describe something that works remarkably well, often in advertising or product descriptions.

• この新しん薬やくは効こう果か抜ばつ群ぐんだ。

  This new medicine is exceptionally effective.

• 効こう果か抜ばつ群ぐんの洗せん剤ざいを見みつけた。

  I found a detergent with outstanding effectiveness.