roommate
n. countablen. a person you share a room or an apartment with. In the US, people use this for anyone living in the same home, even if they have their own bedrooms.
n. a person with whom one shares a room or, more broadly in North American English, an apartment or house. Often implies a shared financial responsibility for rent and utilities.
My roommate always leaves his dirty dishes in the sink.
After graduating, she looked for a roommate to help split the cost of a two-bedroom apartment downtown.
Finding a compatible roommate involves more than just shared interests; it requires a mutual understanding of cleanliness standards and social boundaries within the shared living space.
From room + -mate.
In North American English, it refers to anyone sharing a residence; in British English, 'flatmate' or 'housemate' is preferred unless the individuals literally share a bedroom.
I live with my roomateI live with my roommateLearners often forget the double 'm' in the middle of the word.