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Across
  1. 5. To learn how to do something well; extremely skilled
  2. 6. An angry disagreement between two or more people or groups
  3. 8. To decide which of a group of things are the most important so that you can deal with them first
  4. 9. A natural ability or skill
  5. 10. Feeling ashamed or shy
  6. 11. A period of about 25 to 30 years, in which most human babies become adults and have their own children
Down
  1. 1. Covered and surrounded with a material to stop heat, sound, or electricity from escaping or entering
  2. 2. The forward movement of something, or an improvement or development in something
  3. 3. Special words and phrases that are used by particular groups of people, especially in their work
  4. 4. A detailed study of a subject, especially in order to discover (new) information or reach a (new) understanding
  5. 7. A medicine or chemical that can destroy harmful bacteria in the body or limit their growth