Unit 21 — Other Familiar Prefixes
1. proclaim
2. progress
3. pronounce
4. interfere
5. interrupt
6. internal
7. interview
8. unfortunate
9. unimportant
10. unconstitutional
11. unsatisfactory
12. submarine
13. subway
14. substitute
15.substance
16. subscription
17. advance
18. approach
19. accompany
20. assure
2. progress
3. pronounce
4. interfere
5. interrupt
6. internal
7. interview
8. unfortunate
9. unimportant
10. unconstitutional
11. unsatisfactory
12. submarine
13. subway
14. substitute
15.substance
16. subscription
17. advance
18. approach
19. accompany
20. assure