The country went to war with its archenemy.

这个国家与其要敌开战

A great word that means the same as your archenemy is Nemesis.

和死敌意思一样的词语就是克星(nemesis)。

The lampblack of the kitchen is the archenemy of mom, to this everybody detest.

厨房的油烟是妈妈们的大敌，对此大家深恶痛绝。

For shareholders in Portugal Telecom, the government has now become their archenemy.

对于葡萄牙电信的股东们来说，政府现在变成了他们共同的敌人。

Everyone's favorite mechanical hero returns to face his archenemy one more time in this nerve-racking test of skill.

每个人最喜欢的机械英雄在这个伤脑筋的技能测试中会再次面对他的主要敌人。

While Keating is Roark's professional rival, he is not quite Roark's adversary: by turns contemptible and pathetic, Peter Keating is not up to the role of archenemy.

虽然基廷是罗克生意上的竞争对手，但他不是很像罗克的敌人：卑鄙和下贱的彼特·基廷不配胜任大魔王的角色。