21那个词应该是still。
“It was a working room: part science lab, part infirmary and part kitchen. In later years, as doctors & apothecaries became more widely spread and the products of the still room became commercially available, the still room became increasingly an adjunct of the kitchen. The use of still room devolved to making only jams, jellies, home-brewed beverages and as a store room for perishables such as cakes.”---from Wikipadia