敵軍は橋を破壊されて退路を失った。
With the bridge destroyed, the enemy army lost its line of retreat.
彼は会社を辞めて退路を断ち、起業に専念した。
He quit his job, cutting off his own retreat, and devoted himself to starting a business.
部隊は退路を確保しながら少しずつ前進した。
The unit advanced little by little while securing its escape route.
交渉では相手の退路を完全にふさがないほうがいい。
In negotiations, it is better not to block the other side's way out completely.