capstan

Etymology

Borrowed into Middle English from either Old French cabestan, from Old Occitan cabestan, from cabestre (“pulley cord”) or from Spanish cabestran, both of which derive from Latin capistrum (“halter”), from capiō (“take hold of”).

noun

1. (nautical) A vertical cylindrical machine that revolves on a spindle, used to apply force to ropes, cables, etc. It is typically surmounted by a drumhead with sockets for levers used to turn it.
   We toiled over the capstan, and late in the afternoon slipped out of the harbour. 1951, W. I. B. Crealock, Vagabonding Under Sail, Hastings House (New York), page 211
   Ancient nomads, wishing to ward off the evening chill and enjoy a meal around a campfire, had to collect wood and then spend time and effort coaxing the heat of friction out from between sticks to kindle a flame. With more settled people, animals were harnessed to capstans or caged in treadmills to turn grist into meal. 2013 July-August, Henry Petroski, “Geothermal Energy”, in American Scientist, volume 101, number 4
2. (electronics) A rotating spindle used to move recording tape through the mechanism of a tape recorder.