Sentence:  When they got home Harold was grateful for the stillness in the apartment , and thought how , under different circumstances , they might have stayed on here , in these old-fashioned , high-ceilinged <WSD>rooms</WSD> that reminded him of the Irelands ' apartment in the East Eighties . 
Meaning of the word marked with <WSD> tags:  an area within a building enclosed by walls and floor and ceiling