well-room
/ˈwɛlruːm/ /ˈwɛlrʊm/noun
1A room enclosing a well and its apparatus.
2A room or building at a spa containing the well from which the medicinal water is dispensed.
3 Nautical. A compartment in the bottom of a boat or ship housing pumps or suction pipes, in which bilge water collects.
Origin
Mid 17th century; earliest use found in John Lightfoot (1602–1675), Hebraist and biblical scholar. From well + room.