| A | B |
|---|
| ob, op | against, toward object, oppose |
| per | through, very perfect, permit |
| post | behind, after postpone, postposterity |
| pre, prae | ahaed, before prefix, prepare |
| pro | for, forward, before, in place of pronoun, promote |
| quad | four quadruped, quadrangle |
| re, red | back, again report, repeat |
| retro | backward(s), back, behind retroactive, retrospective |
| se, sed | apart, away, without secede, sedate |
| semi | half semicircle, semiconductor |
|
