war 
英 [wɔː]  美 [wɔr] 
n. 战争（状态，期间）；竞争；冲突；对抗；斗争

v. 进行战争；交战；作战

例句：
They've been at war for the last fifteen years. 

最近15年来他们一直在打仗。

England used to be at war with Germany. 

英格兰曾与德国交战。

People have made war on their neighbours throughout history. 

有史以来，人们一直与邻为战。

Matters of war and peace were discussed at the UN. 

战争与和平问题联合国讨论过了。