反义词是old，例如：

1.The city is dissected by a network of old canals.古老的运河网将这座城市分割开来。

2.The palace is the oldest building in the city.这宫殿是城里最古老的建筑。

3.My new job is much the same as the old one.我的新工作和旧工作差不多。