When -full is added to a base word as a suffix, drop one ‘l’

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Across
  1. 3. Inspiring delight, pleasure, or admiration
  2. 4. Having a practical purpose
  3. 5. A suffix that means full of beauty
  4. 8. Full of fun and energy
  5. 11. Filled with purpose or importance
  6. 12. Bringing happiness or gladness
Down
  1. 1. Causing physical or emotional pain
  2. 2. Providing assistance or aid
  3. 6. Filled with fear or anxiety
  4. 7. Overflowing with gratitude or appreciation
  5. 8. A state of tranquility or calm
  6. 9. Always telling the truth
  7. 10. Causing damage or hurt