Pulley
WordNet
noun
(1) A simple machine consisting of a wheel with a groove in which a rope can run to change the direction or point of application of a force applied to the rope
WiktionaryText
Etymology
From polie from poliva.
Noun
- One of the simple machines; a wheel with a grooved rim in which a pulled rope or chain will lift an object (more useful when two or more pulleys are used together such that a small force moving through a greater distance can exert a larger force through a smaller distance).