Unit 18 — The in/en Prefix
1. increase
2. indebted
3. indeed
4. inquire or enquire
5. inspect
6. insist
7. inform
8. invade
9. inhabit
10. import
11. impatient
12. impossible
13. immediate
14. enclose
15. enforce
16. entire
17. employ
18. irregular
19. illegal
20. irritate
2. indebted
3. indeed
4. inquire or enquire
5. inspect
6. insist
7. inform
8. invade
9. inhabit
10. import
11. impatient
12. impossible
13. immediate
14. enclose
15. enforce
16. entire
17. employ
18. irregular
19. illegal
20. irritate