Crossword

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Across
  1. 2. Completely destroy
  2. 3. Harmful to the environment
  3. 5. Used in specifying the hour of the day
  4. 8. Brought into social contact
  5. 11. How many
  6. 13. Smaller than a centimetre
  7. 14. Prize after achieving something
  8. 16. Depth of liquid
  9. 18. An informed guess
  10. 19. To keep alive or in existence
  11. 21. A number of things or parts working together
Down
  1. 1. Direction
  2. 2. How long something takes
  3. 4. A three dimensional measurement
  4. 6. The start
  5. 7. Equivalent
  6. 8. Opposite of clockwise
  7. 9. To save e.g. energy
  8. 10. At a later part in time
  9. 11. Childish argument
  10. 12. Two weeks
  11. 15. How good something is
  12. 17. Opposite of forwards
  13. 20. Make bigger