Merriam-Webster Collegiate Dictionary - mayhem

 noun  Etymology: Middle English mayme, mahaime, from Anglo-French mahaim mutilation, ~, from maheimer, mahaigner to maim, probably of Germanic origin; akin to Middle High German meiden gelding, Old Norse meitha to injure  Date: 15th century  1.  a. willful and permanent deprivation of a bodily member resulting in the impairment of a person's fighting ability  b. willful and permanent crippling, mutilation, or disfigurement of any part of the body  2. needless or willful damage or violence