Sheave

n. wheel with a grooved rim

A pulley (also called a sheave or block) is a wheel with a groove between two flanges around its circumference. The groove normally locates a rope, cable or  belt. Pulleys are used to change the direction of an applied force, transmit rotational motion, or realize a mechanical advantage in either a linear or rotational system of motion.
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(v.)
A wheel having a groove in the rim for a rope to work in, and set in a block, mast, or the like; the wheel of a pulley.
  

(v. t.)
To gather and bind into a sheaf or sheaves; hence, to collect.
  

      heaves

n.
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