獅し子し奮ふん迅じん

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

furious energy; frenzied activity; ferocious intensity

Describes a person or group acting with the fierce, unstoppable energy of a lion charging forward. Often used with ～の勢い, ～の活躍, or as a の-adjective modifying nouns like 働き, 努力, 攻撃.

• 彼かれは獅し子し奮ふん迅じんの働はたらきでプロジェクトを成せい功こうさせた。

  He made the project a success through his furious efforts.

• 選せん手しゅたちは獅し子し奮ふん迅じんの勢いきおいで攻せめ続つづけた。

  The players kept attacking with ferocious momentum.