migrate 英[maɪˈɡreɪt] v.(随季节变化) 迁徙; 移居;
migr=move
-ate,动词后缀
immigrate 英[ˈɪmɪɡreɪt] v.从外地移入，移居入境
immigrant n. 侨民
emigrate 英[ˈemɪɡreɪt] v. 移居国外
emigrant n.移民