room-mate
noun (British English)(North American English roommate )
(also North American English, informal roomie)
a person that you share a room with, especially at a college or university Topics Educationb2(尤指大学里的)室友,同住一室的人 - (North American English) (British English flatmate)
a person who shares an apartment with one or more others Topics Houses and homesb2合住公寓套间者;同住一屋的人