What is the Origin of Halloween?

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Across
  1. 3. a creature of the night that sucks blood
  2. 5. causing or intended to cause harm or trouble
  3. 8. prevent oneself from displaying or giving way to (a strong urge or emotion).
  4. 10. ​wide in ​range and ​including much ​detailed ​information
  5. 11. something that causes feelings of fear, dread, and shock
Down
  1. 1. witches and wizards uses ______
  2. 2. dress up as, pretend to be
  3. 4. frightening or scary
  4. 6. to face someone especially to deal with a problem
  5. 7. the point or place where something begins, arises, or is derived.
  6. 9. a man that turns into a creature when seeing a full moon