society > inhabiting and dwelling > inhabited place > a building > parts of building > room > types of room by situation > [noun] > room on ground floor
ground-chamber1638
ground room1662
1662 J. Davies tr. A. Olearius Voy. & Trav. Ambassadors 294 The ground-rooms of the House.
1798 M. Edgeworth & R. L. EdgeworthPract. Educ. I. x. 267 Locked up in a ground room.