大たい敵てき

noun

powerful enemy; great rival; archenemy

Refers to a formidable opponent or rival, often in competitive, military, or metaphorical contexts. Can be used for sports rivals, business competitors, or serious adversaries.

• 彼かれは私わたしにとって最さい大だいの大たい敵てきだ。

  He is my greatest rival.

• 油ゆ断だんは大たい敵てきだ。

  Carelessness is a great enemy.