Water

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Across
  1. 2. to have something available to see or use
  2. 4. poisonous
  3. 7. water that is not salty
  4. 8. to collect something together over time
  5. 10. limited; in short supply
  6. 11. to make something clean
  7. 12. to decrease in number
Down
  1. 1. to return something to its original (usually better) state
  2. 3. to make something dirty or harmful
  3. 5. a lack of something
  4. 6. enough
  5. 9. to use something carefully so it lasts a long time