Prefix 'anti'

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Across
  1. 1. a piece of software designed to keep a computer safe from viruses
  2. 2. a substance used to kill germs
  3. 4. a substance given when sick to kill the toxins in a person
  4. 5. a substance that lowers the freezing point of a liquid
  5. 7. someone who is unwilling or not interested in being friendly to others
Down
  1. 1. a controllable force to work against gravity
  2. 2. a cream or liquid used to treat germs in a wound
  3. 3. the direction opposite to the normal direction of the clock hands
  4. 6. a substance that stops poison from working