This document provides examples of English prefixes that can be added to the beginning of words to change their meaning, including "un-" meaning "not" or "opposite of", "re-" meaning "again" or "back", "mis-" meaning "wrong" or "badly", "dis-" meaning "not" or "opposite of", and "non-" meaning "not". Some examples given are unhappy, recall, disappear, unload, mistake, misspell, dislike, replace, mislead, disagree, rewrite, unroll, unknown, and dishonest.

1. Prefixes un-, re-, mis-, dis-, non-

2. 
unhappy

3. 
recall

4. 
disappear

5. 
unload

6. 
mistake

7. 
misspell

8. 
dislike

9. 
replace

10. 
mislead

11. 
disagree

12. 
rewrite

13. 
unroll

14. 
unknown

15. 
dishonest

16. 
react