pulley
noun /ˈpʊli/
  /ˈpʊli/
- a wheel or set of wheels over which a rope or chain is pulled in order to lift or lower heavy objects
enlarge image- a system of ropes and pulleys
 - The scenery was moved across the stage by ropes and pulleys.
 - a system of chains passing over pulleys
 
Word OriginMiddle English: from Old French polie, probably from a medieval Greek diminutive of polos ‘pivot, axis’. 
