opposite 
英 [ˈɒpəzɪt]  美 [ˈɑːpəzɪt] 
adj. 对面的；截然相反的；反对的；对应的

n. 对立物；反义词

adv. 在对面；对边

prep. 在…的对面

例句：
Their houses were at opposite ends of the street. 

他们的房子分别位于这条街道的两端。

Ritter was a very complex man but Marius was the opposite, a simple farmer. 

里特城府颇深，而马里厄斯恰恰相反，是个心地淳朴的农民。

Whatever he says, you can bet he's thinking the opposite. 

不管他说什么，你都可以肯定他想的完全是另一套。

What's the opposite of white? 

与白色相对的颜色是什么？