| A | B |
| circle | a round shape having no beginning or end |
| circlet | a small circle; a ring or round band worn as an ornament, especially on the head |
| circuit | a path for electrical current to flow around |
| circulate | to move around an area or a place, often returning to a starting point |
| circumference | the distance all the way around a circle |
| circumflex | bending around; curved |
| circumnavigate | to go completely around |
| circumrotate | to turn around like a wheel |
| circumspect | careful, careful to look all around before doing something |
| circumvent | to prevent something from happening by careful thinking; to get around something; to entrap |
| transatlantic | across the Atlantic Ocean |
| transcontinental | across a continent |
| transcribe | to write across languages; to translate |
| transect | to cut across or divide by cutting |
| transfer | to move from one place to another; to move across places |
| translate | to cut through any language barrier by changing one language into another |
| translucent | clear; light can pass through; see through but not perfectly clear |
| transparent | perfectly clear; obvious; light shows clearly through |
| transpiration | the process of giving off moisture through pores of skin or through the surface of leaves and plants |
| transport | to carry from one place to another; to carry through an area |