still room
noun
- Brit. historical a room in a large house used by the housekeeper for the storage of preserves, cakes, and liqueurs and the preparation of tea and coffee〈英, 史〉（大宅第中管家的）储藏室; 茶食咖啡制作室。
词源
early 18th cent.: a term used earlier for a room in a house where a still was kept for the distillation of perfumes and cordials.