明めい暗あんを分わける

expression, ichidan verb

decide the outcome; determine victory or defeat

Used when a single event, moment, or factor becomes the decisive turning point that separates success from failure, win from loss.

• この一いち打だが試し合あいの明めい暗あんを分わけた。

  This one shot decided the outcome of the match.

• 最さい終しゅう日びのプレゼンが両りょう社しゃの明めい暗あんを分わけるだろう。

  The final-day presentation will likely determine which company comes out on top.

expression, ichidan verb

be sharply contrasted; show a stark difference

Describes two things, situations, or people whose outcomes, qualities, or fates are dramatically different, often in a way that highlights a clear contrast.

• 同おなじ環かん境きょうで育そだったのに、二人ふたりの人じん生せいは明めい暗あんを分わけた。

  Although they grew up in the same environment, their lives turned out sharply different.

• 今こん回かいの試し験けん結けっ果かが、努ど力りょくした者ものとしなかった者ものの明めい暗あんを分わけた。

  This exam result sharply separated those who worked hard from those who did not.