crossword puzzle

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Across
  1. 1. to try to achieve or get something over a period of time
  2. 6. something you do to help achieve a goal or improve a situation
  3. 8. to look at two or more things to see how they are the same or different
  4. 9. to work for a person, group, or organization, or to help others
  5. 12. to feel or show sadness for someone who has died or something lost
Down
  1. 2. to make something stronger or more effective
  2. 3. to travel around an area to find out about it, or to learn about something new
  3. 4. to give a lot of time and effort to something you care about
  4. 5. an amount of money saved or collected for a particular purpose
  5. 7. the fact of no longer having something or someone, or the act of losing them
  6. 10. the part of a plant that grows under the ground, or the main cause of something
  7. 11. to get money by working