ACT must know words

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Across
  1. 3. Make partial or minor changes.
  2. 5. Wear away over time.
  3. 6. A climb or walk up a hill or mountain
  4. 8. Not easily convinced.
  5. 12. Warm and friendly.
  6. 14. Friendly or good to talk to.
  7. 16. Occurring nearer to the end.
  8. 18. A guess.
  9. 19. Absolutely necessary or important.
  10. 20. Unbelievable.
Down
  1. 1. Enough; adequate.
  2. 2. Exist or occur at a date earlier.
  3. 4. Having great power, influence, or effect.
  4. 7. Not covered.
  5. 9. Prevent something from being known or noticed.
  6. 10. Honest or straightforward.
  7. 11. Having a relaxed, friendly, or unofficial style.
  8. 13. Existing only in part.
  9. 15. To grow quickly.
  10. 17. Make or become less.
  11. 21. The exact amount.