Other forms: winches; winched; winching
A winch is a kind of tool for tightening or loosening the tension of a rope or cable. If you take up sailing, you might use a winch to adjust the position of the sails. Ahoy, matey!
You use a winch for things like pulling out cars stuck in the mud or snow. Tow trucks have winches, and so do sailboats, for tightening (or "trimming") a sail line. As a verb, winch means to use one: "I told you not to drive through that mud. Now we'll have to winch you out of there." The root of winch means "to bend," possibly in reference to the shape of a winch's handle.