Definitions of trammel:

• noun:   a restraint that is used to teach a horse to amble
• noun:   an adjustable pothook set in a fireplace
• noun:   a fishing net with three layers; the outer two are coarse mesh and the loose inner layer is fine mesh
• noun:   a restraint that confines or restricts freedom (especially something used to tie down or restrain a prisoner)
• verb:   place limits on (extent or access)
• verb:   catch in or as if in a trap
• name:  A surname (rare: 1 in 100000 families; popularity rank in the U.S.: #9077)