Prefixes bi, tri, mono, uni

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Across
  1. 1. speak one language
  2. 2. speaking with one note
  3. 4. one wheeled bicycle
  4. 5. has two sides
  5. 8. split into two pieces
  6. 9. to come together as one
Down
  1. 1. glasses for one eyeball
  2. 3. horse with one horn
  3. 5. something that walks on two legs
  4. 6. three copies
  5. 7. three stories