sheave,
n. [Akin to OD.
schijve orb, disk, wheel, D.
schiff, G.
scheibe, Icel.
skīfa a shaving, slice; cf. Gr. a staff. Cf.
Shift,
v.,
Shive.].
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. [1913 Webster]
Sheave hole, a channel cut in a mast, yard, rail, or other timber, in which to fix a sheave.