Suffix less, ness, ly

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Across
  1. 3. Alone
  2. 5. Without care
  3. 8. Opposite of Strength
  4. 11. Opposite of happiness
  5. 12. Beautiful
Down
  1. 1. Needing help
  2. 2. Opposite of harmful
  3. 4. Illness
  4. 6. Lacking hope
  5. 7. Joy
  6. 9. Silently
  7. 10. Cleverly