Strong adjectives

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Across
  1. 1. When people don't wash their hair for a week
  2. 3. When it's hot in Sochi
  3. 7. I feel ... when I see a snake
  4. 10. 100% sure
  5. 11. I haven't eaten anything today, I'm ...
  6. 12. extremely interesting
Down
  1. 2. A very funny film can be ...
  2. 4. A book which is extremely interesting is ...
  3. 5. WOW!!!!
  4. 6. absolutely angry
  5. 8. Blue Whales are .... mammals
  6. 9. it can bee a very little thing