n.

1. 敌人，仇敌[C]
   Don't make an enemy of him.

   不要与他为敌。

2. 敌军[the S][G]
   The enemy was/were attacking the town.

   敌军正在攻打该城。

   The enemy gave up without resistance.

   敌军没有抵抗就投降了。

3. 敌舰；敌国；敌机[C]
   The enemy was shot down by our anti-aircraft fire.

   敌机被我方的高射炮火击落。

4. 大敌；大害；危害物[S1]
   Frost is an enemy of flowers.

   霜冻是花卉的大敌。

a.

1. 敌人的，敌方的
   Enemy aircraft were detected by our radar.

   敌机被我方雷达发现。

n.