Even more words that start with the letter U

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Across
  1. 3. Like a bicycle with one wheel
  2. 4. To say something
  3. 6. moving up
  4. 7. To loosen a knot
Down
  1. 1. A strong feeling to do something
  2. 2. One single thing
  3. 3. Feeling sad or mad
  4. 4. All of space
  5. 5. To open a zipper
  6. 7. To take things out