roomie
noun (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 Topics Houses and homesc2合住公寓套间者;同住一屋的人