The enemy

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Across
  1. 2. the state of being unconscious
  2. 4. climb, move, or get in or out of something in an awkward and laborious way, typically using both hands and feet
  3. 6. relating to aerodynamics
  4. 8. serving as a temporary substitute; sufficient for the time being
  5. 12. free from flaws or mistakes; perfect
  6. 14. a confused struggle or fight
  7. 15. very bright; harsh to the eye
  8. 17. move irregularly with a splashing sound
  9. 19. break or cause to break into small sharp fragments
  10. 20. dark and dirty; not clear
Down
  1. 1. filled with horror; extremely shocked
  2. 3. comically or repulsively ugly or distorted
  3. 5. relating to or concerned with the relation of living organisms to one another and their physical surroundings
  4. 7. a strike that retaliates against or counter earlier strike
  5. 9. a simple, nonflowering, and typically aquatic plant
  6. 10. an ancient Norse warrior who fought in a wild frenzy
  7. 11. moving with a slow, shuffling, awkward gait
  8. 13. drained of one's physical or mental resources; very tired
  9. 16. an indiscriminate and brutal slaughter of people
  10. 18. go hurriedly through a place stealing things and causing damage