siege

中文： 攻城战、包围战、围城、围困

1. A prolonged military assault or a blockade of a city or fortress with the intent of conquering by force or attrition. · They sued for peace after the long siege.
2. A period of struggle or difficulty, especially from illness. (US)
3. A prolonged assault or attack. (figuratively)
4. The seat of a heron while looking out for prey.
5. A flock of herons.

复数 sieges