enemy

敌人、仇敌、对头

He has made many enemies during his years in politics.

他从政多年，结下了不少敌人。

敌军、敌方常与 the 连用

The enemy retreated after losing control of the bridge.

敌军失去对那座桥的控制后便撤退了。

大敌、祸害

Impatience is the enemy of careful planning.

急躁是周详规划的大敌。

敌方的、敌军的限定用法

Enemy aircraft were spotted near the northern border.

北部边境附近发现了敌方飞机。