im- in- into, on, toward

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Across
  1. 1. – Insert with a syringe
  2. 2. – Make a lasting mark or effect
  3. 4. – Put money or effort into
  4. 5. – Fill with air or gas
  5. 7. – Inside, not outdoors
  6. 8. – Enter forcefully or attack
Down
  1. 1. – Strong effect or collision
  2. 2. – Begin line with a space
  3. 3. – Sudden urge or desire
  4. 4. – Examine closely
  5. 5. – Significant or of great value
  6. 6. – Bring in goods from abroad
  7. 7. – Make better or enhance