chimney (n.) Look up chimney at Dictionary.com
late 13c., "furnace;" early 14c., "chimney stack of a fireplace;" late 14c., "fireplace in a residential space;" from Old French cheminee "fireplace; room with a fireplace; hearth; chimney stack" (12c., Modern French cheminée), from Late Latin (camera) caminata "fireplace; room with a fireplace," from Latin caminatus, adjective of caminus "furnace, forge; hearth, oven; flue," from Greek kaminos "furnace, oven, brick kiln." Jamieson [1808] notes that in vulgar use in Scotland it always is pronounced "chimley." Chimney sweep attested from 1610s, earlier chimney sweeper (c.1500).