Prefix inter-

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Across
  1. 7. (adj) between the states
  2. 8. (v) to throw a remark into a conversation between two or more people
  3. 9. (adj) between people (usually describing social activities)
  4. 10. (n) a meeting of people face to face
  5. 11. (adj) involving people playing among themselves; an exchange of activity or information between people or people and a computer
Down
  1. 1. (n) the break between parts of a play, opera, or concert
  2. 2. (n) a person who becomes involved in a place or situation where they are not wanted or are considered not to belong.
  3. 3. (v) to get in between two people when it is not your problem or issue
  4. 4. (v) to break into a conversation between people
  5. 5. (adj) between or among the nations of the world
  6. 6. (n) a person who helps translate the languages between different people
  7. 8. (n) the worldwide computer system that allows communication and information sharing among people