1. Etymology Study- August
Etymology study helps you spell challenging words. It helps you understand new, interesting words. It might make you a word nerd! 

2. Submarine Submerge Subdue (to bring under control) Subway
Etymology Study
Sub- under (Latin)
Submarine
Submerge
Subdue (to bring under control)
Subway

3. Nonfat Nonsense Nonprofit nonfiction
Etymology Study
Non- not (Latin)
Nonfat
Nonsense
Nonprofit
nonfiction

4. Centipede Cent (one penny) Century Centenial
Etymology Study
Cent/centi- 100 (French)
Centipede
Cent (one penny)
Century
Centenial

5. Pretest Prefix Precede predict
Etymology Study
Pre- before (English)
Pretest
Prefix
Precede
predict

6. Reengage Redo Remake reabsorb
Etymology Study
Re- again (Latin)
Reengage
Redo
Remake
reabsorb

7. Anti- opposite/against (English)
Etymology Study
Anti- opposite/against (English)
Antibacterial
Antisocial
Anticlimax
Antipathy (not caring)

8. Disrespect Disengage Disassemble disassociate
Etymology Study
Dis- away (English)
Disrespect
Disengage
Disassemble
disassociate

9. Etymology Study
Find the root word:
Pretest
Redo
disengage

10. Etymology Study
Find the root word:
Pretest
Redo
disengage