furnace
/ˈfɜːnɪs/noun
1- an enclosed structure in which material can be heated to very high temperatures, e.g. for smelting metals炉子, 熔炉。
1.1
- an appliance fired by gas or oil in which air or water is heated to be circulated throughout a building in a heating system（建筑物内的）暖气炉。
1.2
- used to describe a very hot place火炉, 极闷热的地方：
her car was a furnace.
她的汽车热得像是一个火炉。
词源
Middle English: from Old French fornais（e）, from Latin fornax， fornac-, from fornus 'oven'.