pulley

Từ điển Oxford Advanced Learner 8th

pul·ley [pulley pulleys] BrE [ˈpʊli] NAmE [ˈpʊli] noun
a wheel or set of wheels over which a rope or chain is pulled in order to lift or lower heavy objects
•a system of ropes and pulleys

Word Origin:
Middle English: from Old French polie, probably from a medieval Greek diminutive of polos ‘pivot, axis’.

Example Bank:
•The scenery was moved across the stage by ropes and pulleys.
•a system of chains passing over pulleys

• Từ đồng nghĩa / Synonyms:
  pulley-block, pulley block, block