| clandestine | Kept secret or done secretively, especially because illicit | |
| clairvoyant | Having or exhibiting an ability to perceive events in the future or beyond normal sensory contact | |
| circumvent | To find a way around an obstacle or problem | |
| circumspect | Wary and unwilling to take risks | |
| circumscribed | Restricted within limits | |
| circuitous | Not direct | |
| cinematic | Relating to motion pictures or the art of making motion pictures | |
| churlish | Rude in a mean-spirited and surly way | |
| chronological | Arranged in the order of time that the events occurred or took place | |
| choleric | Bad-tempered or irritable. | |