| A | B |
| circle | a round shape with no beginning or end |
| circlet | a small circle |
| circuit | a path for electrical current to flow |
| circulate | to move around a place |
| circumference | the distance all the way around a circle |
| circumflex | bending around |
| circumnavigate | to sail around the world |
| circumrotate | to turn around like a wheel |
| circumspect | cautious, careful before doing something |
| circumvent | to go around |
| transatlantic | across the Atlantic Ocean |
| transcontinental | across a continent |
| transcribe | to write across languages |
| transect | to cut across |
| transfer | to move from one place to another |
| translucent | light can pass through but not clear |
| transparent | perfectly clear |
| transpiration | process of giving off moisture through leaves |
| transport | to carry from one place to another |
| translate | to change from one language to another |