Just me and my backpack

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Across
  1. 5. to step heavily and carelessly on something
  2. 6. a group of similar things close together; bunch; collection
  3. 11. bees, wasps and jellyfish can all do this
  4. 14. übermorgen
  5. 15. to clean an area by brushing away dirt; to move swiftly
  6. 18. A synonym for "guy" or "dude"
  7. 19. a flat area outside a building
  8. 20. used to admit something is reasonable/ acceptable
  9. 23. informal Australian name for a barbecue
  10. 25. used to express what you hope will happen
  11. 26. something you did in the past; something that is familiar to you
Down
  1. 1. a device sent into space to orbit the Earth
  2. 2. to decide that an event will not take place/ happen
  3. 3. Hai
  4. 4. to shine brightly, especially with reflected light; shine
  5. 5. to stop something from happening
  6. 7. Würfelqualle
  7. 8. Hafenviertel
  8. 9. something makes a strong, positive impact; awe; respect
  9. 10. causing or able to cause death
  10. 11. to hear something without meaning to
  11. 12. making someone feel less sad, worried etc.
  12. 13. the hard, protective outer casing of a sea creature
  13. 16. Dangerous, fast area of water that can pull people out to sea
  14. 17. gemstone; can be making different colours depending on the light
  15. 21. an aircraft used to transport sick or injured people to hospital
  16. 22. a small creature with eight legs
  17. 24. a period of time with much hotter weather than usual