Fill in the crossword

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Across
  1. 5. to try to judge the value, size, speed, cost etc of something, without calculating it exactly
  2. 7. a deep narrow valley with steep sides
  3. 11. something that you think is true although you have no definite proof
  4. 12. to become smaller in amount, level, importance etc
  5. 14. the official line that separates two countries, states, or areas, or the area close to this line
  6. 15. to invent a new word or expression, especially one that many people start to use
Down
  1. 1. advancement
  2. 2. the feeling that you have when you think you are going to vomit (=bring food up from your stomach through your mouth)
  3. 3. a shaking movement
  4. 4. written in the form of a letter or a series of letters
  5. 6. strange, unfamiliar, or a little surprising
  6. 8. a piece of material that covers the inside of something, especially a piece of clothing
  7. 9. to cause something unpleasant to happen
  8. 10. similar to something
  9. 13. a thick piece of wood cut from a tree