New vocabulary (education)

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Across
  1. 5. To preserve or keep something in memory.
  2. 6. To gather the energy.
  3. 9. To gather courage, strength, or energy.
  4. 12. To complete a task within a specific time limit.
  5. 13. To a significant or considerable extent.
  6. 14. Clear, logical, and easy to understand.
  7. 15. Excessively high or unreasonable.
  8. 16. To appear threateningly in the distance or become significant.
  9. 17. To make use of something.
Down
  1. 1. Exhausted and worn out.
  2. 2. To hesitate or have doubts about something.
  3. 3. To begin or start something.
  4. 4. A reason or explanation for an action or belief.
  5. 7. To demand an effort or exertion.
  6. 8. Having a strong will to do something and not giving up.
  7. 10. To refresh knowledge or skills.
  8. 11. Extremely important or decisive.