Breaker

1. One who, or that which, breaks.
2. Specifically: A machine for breaking rocks, or for breaking coal at the mines; also, the building in which such a machine is placed.
3. (Naut.) A small water cask.
4. A wave breaking into foam against the shore, or against a sand bank, or a rock or reef near the surface.
5. a quarry worker who splits off blocks of stone.