| A | B |
|---|
| circuit | (n) a revolving; a journey around; a route |
| circulatory | (adj) going in a circuit, circular |
| circumnavigate | (v) to sail around |
| circumstance | (n) the condition surrounding or related to an event |
| circumvent | (v) to go around or bypass |
| period | (n) the interval between certain happenings |
| periodic | (adj) happeing at regular intervals; happening from time to time |
| perigee | (n) the point in the moon's or a satellite's orbit that is closest to the Earth or body it is orbiting |
| periphery | (n) the outer boundary of something |
| periscope | (n) an instrument for seeing around things |
| cir, circum | prefix meaning around |
| peri | prefix meaning around, surrounding, near |
| forecast (v) | to predict or estimate in advance |
| forethought (n) | a thought that comes beforehand, a prediction |
| forewarn (v) | to warn beforehand |
| posterior (n) | the back side |
| posthumous (adj) | happening after someone's death |
| postpone (v) | put off until a later time |
| preamble (n) | an introduction or introductory explanation |
| precaution(n) | care taken beforehand |
| premature (adj) | happening or ripening before the natural or proper time |
| premier (n) | the first performance or showing |
| fore | before, toward |
| pre | before, toward |
| post | after, behind |
| procrastinate | (v) to put off doing something until a later time |
| profess | (v) to come forward and make a public declaration |
| prologue | (n) the introductory part of a book, play,or poem |
| promontory | (n) the highest point of land projecting out over a body of water or land |
| propensity | (n) a natural inclination toward |
| retroactive | (adj) having an effect on things in the past |
| retrofire | (v) to ignite a retrorocket |
| retrogress | (v) to move backward, especially to an earlier or worse state |
| retrospect | (n) looking back on the past, a view of the past |
| retrospective | (adj) looking back on the past or past events |
