#knife.weapon_system  a weapon with a handle and blade with a sharp point
  supertype:  #weapon__weapon_system__arm  instrument used in fighting or hunting; "he was licensed to carry a weapon"
  part:  #point.convex_shape
  subtype:  #bayonet  a knife that can be fixed to the end of a rifle and used as a weapon
  subtype:  #sticker  a short knife with a pointed blade used for piercing or stabbing
     subtype:  #dirk  (Scottish) a long dagger with a straight blade
     subtype:  #poniard__bodkin  a dagger with a slender blade
     subtype:  #stiletto  a small dagger with a tapered blade
  subtype:  #flick-knife__flickknife  a knife with the blade hidden in the handle; the blade springs out when a button is pressed
  subtype:  #machete__panga  a large heavy knife used in Central and South America as a weapon or for cutting vegetation
  subtype:  #shiv  a knife used as a weapon
  subtype:  #trench_knife  a knife with a double-edged blade for hand-to-hand fighting
  subtype:  #yataghan  a long Turkish knife with a curved blade having a single edge

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