the word 'taproom' is a transparent compound from two old english roots. 'tap' originally referred to a wooden stopper or spigot used to control the flow of liquid from a cask, a meaning that naturally specialized to beer in a pub context. 'room' has consistently denoted an enclosed space or chamber. combined in the late 18th century, the term literally means "a room where beer is drawn from taps," directly and logically describing the specific bar area in a public house where drinks are dispensed and served.

Structure: tap (noun) + room (noun) 'tap' (from old english 'tæppa', meaning a plug or spout for drawing liquid); 'room' (from old english 'rūm', meaning space or chamber).