roomie
noun /ˈruːmi/,  /ˈrʊmi/
  /ˈruːmi/,  /ˈrʊmi/
(North American English, informal) (also room-mate British English, roommate North American English)
- a person that you share a room with, especially at a college or university(尤指大学里的)室友,同住一室的人 
- (North American English) (British English flatmate)a person who shares a flat with one or more others合住公寓套间者;同住一屋的人