PARBUCKLE

[par.buck.le] n [origin unknown] (1626): a purchase for hoisting or lowering a cylindrical object by making fast the middle of a long rope aloft and looping both ends around the object which rests in the loops and rolls in them as the ends are hauled up or paid out; also: a single line made fast at one end and passed around an object that is used similarly -- parbuckle vt