What does the song Rolling in the Deep mean?

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Tags

1. #about
2. #before
3. #expression
4. #times
5. #adele
6. #ultimately
7. #always
8. #defines
9. #someone
10. #never
11. #meaning
12. #relationship
13. #rolling
14. #failed
15. #throughout
16. #appears
17. #several