stillroom

[ stil-room, -roo m ]
/ ˈstɪlˌrum, -ˌrʊm /

noun

(in a large house) a room for distilling or for the preparation of special foods and drinks.
a room off a kitchen for making tea, coffee, etc., and for storing liquors, tea, preserves, jams, wine, etc.

Origin of stillroom

First recorded in 1700–10; still2 + room

British Dictionary definitions for still room

still room

noun British

a room in which distilling is carried out
a pantry or storeroom, as in a large house