7. circum = around, about; circumnavigate, circumscribe, circumvent
8. con (col, com, co, cor, etc.) = with, together; consent, collect, coördinate, composite, conspiracy
9. contra (counter) = against; contradict, counteract, countermand
10. de = down, from, away; depose, desist, decapitate, denatured
11. demi, hemi, semi = half; demi-tasse, hemisphere, semiannual, semitransparent
12. di (dis) = twice, double; dissyllable
13. dis (di, dif) = apart, away, not; distract, diverge, diversion, disparage
14. en (em) = in, on, into; engrave, embody, embrace
15. extra = beyond; extraordinary, extravagant