外敵的英文：
a foreign enemy; an enemy from outside

foreign是什么意思：
adj. 外国的；不属于本身的；无关的；外交的；陌生的

In the UK, there are the Foreign Office and Foreign Secretary.
在英国，有外交部和外交大臣。

custom of foreign trade.
对外贸易惯例

The guidebook is for the accommodation of foreign tuorists.
这份指南是为了方便外国游客而准备的。

The foreign market was increasingly crucial.
国外市场越来越重要了。

Deception was foreign to his nature.
欺骗和他的本性格格不入。

enemy是什么意思：
n. 敌人，仇人；敌军；敌舰；敌国；敌机；大敌；大害
adj. 敌人的，敌方的

charge the enemy
向敌人冲去

The enemy yielded.
敌人投降了。

They surprised the enemy.
他们奇袭了敌人。

The enemy circled their fortress.
敌人包围了他们的堡垒。

The enemy was attacking the town.
敌军正在攻打该城。