What is the real meaning of Hello?

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Tags

1. #people
2. #several
3. #surprise
4. #1800s
5. #attention
6. #hallo
7. #relatively
8. #attract
9. #greet
10. #prevalent
11. #hello
12. #times
13. #holla
14. #which
15. #source
16. #alteration
17. #hollo
18. #existence