#descent  the act of changing your location in a downward direction
  supertype:  #human_motion__humanmotion__motion__movement__move  the act of changing your location from one place to another; "police controlled the motion of the crowd"; "the movement of people from the farms to the cities"; "his move put him directly in my path"
  subtype:  #abseil  a descent down a nearly vertical surface by using a doubled rope that is coiled around the body and attached to some higher point
  subtype:  #parachuting__jump  descent with a parachute; "he had done a lot of parachuting in the army"
     subtype:  #sky-diving__skydiving  performing acrobatics in free fall before pulling the ripcord of a parachute
  subtype:  #nose_dive__dive  a steep nose-down descent by an aircraft
     subtype:  #power_dive__powerdive  a dive accelerated by both gravity and engine power
  subtype:  #swoop  a swift descent through the air
  subtype:  #crash_dive__crashdive  a rapid descent by a submarine
  subtype:  #drop  the act of dropping something; "they expected the drop would be successful"
  subtype:  #flop__collapse  the act of throwing yourself down; "he landed on the bed with a great flop"

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