i & j

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Across
  1. 3. a deep understanding
  2. 7. having great value
  3. 8. a thick tangled forest
  4. 9. being full of joy
Down
  1. 1. where two bones meet
  2. 2. the inner part
  3. 4. getting better at something
  4. 5. putting together
  5. 6. part of your mouth
  6. 8. a feeling of happiness