Baby talk

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Across
  1. 2. - usually or in a typical way
  2. 6. - cannot hear sounds
  3. 7. - the ability to hear
  4. 9. (n.)** - a careful study to learn more about something
Down
  1. 1. - a very young baby
  2. 2. - to share information with others
  3. 3. - to grow or change over time
  4. 4. test** - a test to see how well someone thinks and learns
  5. 5. - to become bigger or increase
  6. 8. - a symbol or gesture that gives information