room: [OE] The Old English word for ‘room’ was cofa (ancestor of modern English cove ‘sheltered bay’). At that time, room meant simply ‘space’ (as its German relative raum still does). Its modern sense ‘chamber’ did not emerge until the 15th century. It comes ultimately from the prehistoric Germanic adjective *rūmaz ‘spacious’, which may be related to Latin rūs ‘country’, source of English rural and rustic. Rummage is a distant relative. => rummage, rural[room etymology, room origin, 英语词源]