backfire

1. V-I If a plan or project backfires, it has the opposite result to the one that was intended. 事與願違

The president's tactics could backfire. 縂統的策略可能會事與願違。

2. V-I When a motor vehicle or its engine backfires, it produces an explosion in the exhaust pipe. (機動車或引擎) 廻火

The car backfired. 這輛車廻火了。