Pulleys

Part of speech: noun

Pronunciation: /ˈpʊliz/

Definitions

1. A set of wheels and ropes designed to lift or maneuver weights by altering force direction and providing mechanical advantage
2. Devices that utilize circular components to assist in moving loads by changing the angle of applied force, enhancing the efficiency of lifting tasks
3. Mechanical wheels featuring a groove to guide a rope or cable, allowing heavy objects to be raised or shifted with less effort

Etymology: The word "pulleys" is simply the plural of "pulley," and the singular has an unexpected origin. Its ancestor was a Greek diminutive meaning "little pivot," built on "pólos," a word for a hinge or axis that came from a root meaning "to turn." Vulgar Latin speakers turned this into "polidia," and because that plural looked like a feminine noun, it became a new singular, which then passed through Old French as "poulie" before reaching Middle English as "puly" and "poley." Many people assume the word comes from "pull," and that folk etymology has persisted, but the connection is a coincidence. The machine's job is to turn force around a wheel, not to pull in the sense of the verb, so the true story is one of rotation rather than tugging.

Synonyms: sheaves, rollers