2.  Prefix is a word part that can be added to the beginning of a word to make a new word.  Suffix is a word part that can be added to the end of a word to make a new word.  Root Word is the word that is left over when prefixes and suffixes have been removed.

3. Prefix multi means many Examples: multiply multipurpose

4. Prefix pre means before Examples : prelude, precondition, precede

5. against/opposite Examples : anti-aircraft, antibiotic, anticlimax

6. one Examples: monopoly, monorail, monologue

7. Prefix bio means life Examples: biography, biology, biosphere

8. two Examples: bicycle, biweekly, biannual

9. Prefix counter means opposite direction Examples: counterclockwise counteract

10. Prefix de means down Example: descend

11. good Examples: benefit, benefactor, beneficial

12. between/among Examples: interact. interchange

13. Inside/within Examples: intramural, intravenous

14. against or opposite Example: contraceptive

15. Prefix hemi means half Example: hemisphere

16. Prefix peri means round Examples: periscope, perimeter

17. after Examples : postpone, postgame

18. in support of in favor of Examples: pro- American, pro-life

19. Half Examples: semicircle, semi-conscious

20. Prefix sub means Under Examples : submarine, subsoil

21. Distance Examples: television, telegraph

22. Prefix therm means Heat Examples : thermometer, thermostat

23. across Examples : transatlantic, transcontinental

24. Prefix geo means earth Examples: geometry, geography geology

25. Prefix un means not Examples: unreal, unhappy

26. Prefix dic means say Examples : dictionary, dictate

27. not, reverse Examples: dismiss, disrespect

28. blood Examples: hemorrhage, hemophilia

29. billionth Examples: nanosecond, nanobucks

30. Prefix omni means all Examples: omniscient, omnivorous

31. shape/form Examples: morphology, metamorphosis

32. killing Examples: suicide, genocide

33. cutting Examples: appendectomy, tonsilectomy

34. one who believes in Examples: communist, terrorist

35. without Examples: childless, endless

36. Suffix logy means study field of Examples: biology, geology, cardiology

37. Suffix phobia means exaggerated fear Examples: claustrophobia, arachnaphobia

38. Suffix ism means the belief in Examples: communism, terrorism

39. Prefix that means one? un mono unicycle, universe monologue

40. Prefix that means two? bi du bicycle duet

41. Prefix that means three? tri tricycle triangle

42. Prefix that means four? quad tetra quadruplets tetrameter

43. Prefix that means five? quint penta quintuplets pentagon

44. Prefix that means six? sex hex sextuplets hexagon

45. Prefix that means seven? sept september

46. Prefix that means eight? oct octagon

47. Prefix that means nine? nov novena

48. Prefix that means ten? dec decade