spoke 1 
(spōk)
(spōk)n.
1. One of the rods or braces connecting the hub and rim of a wheel.
2. Nautical One of the handles projecting from the rim of a ship's steering wheel.
3. A rod or stick that may be inserted into a wheel to prevent it from turning.
4. A rung of a ladder.
tr.v. spoked, spok·ing, spokes
1. To equip with spokes.
2. To impede (a wheel) by inserting a rod.
[Middle English, from Old English spāca.]
spoke1