1. 12 Most Common Prefixes

2. ab- ab- abnormal- not normal or average

3. Be - on all sides, overly Beckon-to signal, summon, or direct by a gesture of the head or hand. to lure; entice.

4. De- Reversal, undoing, downward Decelerate-to decrease the velocity of Debate-to engage in argument or discussion, as in a legislative or public assembly

5. Dis- not, reversal Disrespect-lack of respect; discourtesy; rudeness. Disarm-to deprive of a weapon or weapon

6. Ex - out of, former Execute-to carry out; accomplish: to execute a plan or order. Extraordinary-beyond what is usual, ordinary, regular, or established: extraordinary costs.

7. Pre- before Preview- an earlier or previous view.

8. Re- again, restore React- to act in opposition, as against some force. Re-enter to enter again, to participate in once more; resume (ReDo) To revise or reconstruct ; to redo the production schedule

9. Ad- to,toward Advantage- any state, circumstance, opportunity, or means specially favorable to success, interest, or any desired end Advertisement- a paid annoucement, as of good for sale, in newspaper or magazines, on raido, tv, etc.

10. Com-, con-, co- with, together Combine- united, joined Continued- lasting or enduring without interruption

11. En-, em- in, into, to cover or contain Enrolled- to write the name of (a person) in a roll or register End- a final part of sometime, esp. a period of time, an activity, or a story

12. Un- do the opposite of Undo- to reverse the doing of