Chock

noun
1
- A wedge or block placed against a wheel or rounded object, to prevent it from moving.
- A support on which a rounded structure, such as a cask or the hull of a boat, may be placed to keep it steady.

2
 - A fitting with a gap at the top, through which a rope or line is run.

 verb [ trans. ] (often be chocked)
- To prevent the forward movement of (a wheel or vehicle) with a chock.
- To support (a boat, cask, etc.) on chocks.