勝しょう敗はいの鍵かぎを握にぎる

expression, godan verb (-ru)

hold the key to victory or defeat; have the outcome in one's hands

Idiomatic phrase used when a particular factor, person, or action will determine who wins or loses. Often used in sports, games, or competitive contexts.

• この試し合あいの勝しょう敗はいの鍵かぎを握にぎるのは、エースピッチャーの調ちょう子しだ。

  The ace pitcher's condition holds the key to victory or defeat in this game.

• 最さい終しゅう問もん題だいが勝しょう敗はいの鍵かぎを握にぎることになった。

  The final question ended up deciding the outcome.