#hammer  a hand tool with a heavy rigid head and a handle; used to deliver an impulsive force by striking
  supertype:  #hand_tool  a tool used with workers' hands
  subtype:  #ball-peen_hammer  #bricklayer's_hammer  #carpenter's_hammer  #mallet.hammer  #maul  #plexor  #tack_hammer
  part:  #hammerhead  the striking part of a hammer
     part:  #peen  the part of a hammerhead opposite the flat striking surface (may have various shapes)
  part:  #head.striker  the striking part of a tool; "the head of the hammer"
     part:  #face.surface  the striking or working surface of an implement

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