| A | B |
| POST | PREFIX MEANING: after |
| PRE | PREFIX MEANING: before |
| RE | PREFIX MEANING:again, back |
| SEMI | PREFIX MEANING:half, partly |
| SUB | PREFIX MEANING:under, below |
| TRANS | PREFIX MEANING:across, over, change |
| TRI | PREFIX MEANING:three |
| UN | PREFIX MEANING:not |
| UNDER | PREFIX MEANING:below, under |
| UNI | PREFIX MEANING:one |
| postscript | WORD MEANING:a note added at the end of a letter, after the signature |
| preheat | WORD MEANING:warm up before using |
| rewrite | WORD MEANING:write again, revise |
| semicircle | WORD MEANING:half a circle |
| submarine | WORD MEANING:a boat that operates under water |
| transcontinental | WORD MEANING:across a continent |
| tricycle | WORD MEANING:a three-wheeled vehicle |
| uncomfortable | WORD MEANING:not comfortable |
| underage | WORD MEANING:below or less than the usual or required age, too young |
| unicycle | WORD MEANING: a one-wheeled vehicle |
| POLY | PREFIX MEANING: Many |
| polygon | WORD MEANING: a shape with many sides |
| polysyllable | WORD MEANING: a word with many (more than three) syllables |