recognize 
英 [ˈrɛkəɡˌnaɪz]  美 [ˈrekəɡnaɪz] 
v. 认出，识别；承认；确认；具结

例句：
The receptionist recognized him at once. 

接待员一下就认出了他。

She didn't recognise me at first. 

起先她没有认出我来。

I recognized him by his walk. 

我从他走路的样子认出了他。

You'll recognize me by my red hair. 

你从我的红头发就能认出我来。