Lodger (noun)

1. A tenant in someone's house who rents a room or rooms and usually shares the kitchen and bathroom.
2. A person who rents a room in a private house and shares the use of the kitchen and other facilities.

Origin:

From middle english loggere, from old english lodhār, from lodian, to lodge.

Examples:

1. The lodger was staying in the spare room for a few weeks.
2. The lodger paid the landlady a weekly rate for the room.
3. The lodger had a key to the house and could come and go as he pleased.
4. The lodger was a quiet and respectful tenant.
5. The lodger was a student who needed a place to stay while studying in the city.