lodger
noun [ C ] uk/ˈlɒdʒ.ər/ us/ˈlɑː.dʒɚ/ (US also roomer)
寄宿者,房客
someone who pays for a place to sleep, and usually for meals, in someone else's house
She takes in lodgers to make some extra money. 她接收房客以便挣点外快。
Synonym: boarder