post

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Across
  1. 1. means occurring a surgial operation
  2. 2. means relating to, or occurring in the time following death
  3. 5. means arising, occurring, or continuing after ones death
  4. 6. means, with the greatest possible speed or promptness
Down
  1. 1. means the act of putting something off to a later time
  2. 3. means situated behind or at the rear hinder
  3. 4. post means after and natal means giving birth
  4. 5. means three things one is a pole/post, the second one is a post/mail, and the Third one is you post something on the internet.
  5. 6. means succeeding or future generations collectively