| circumscribed | Restricted within limits | |
| circumspect | Wary and unwilling to take risks | |
| circumvent | To find a way around an obstacle or problem | |
| clairvoyant | Having or exhibiting an ability to perceive events in the future or beyond normal sensory contact | |
| clandestine | Kept secret or done secretively, especially because illicit | |
| clangorous | Making a loud, resonant sound | |
| clemency | Mercy or leniency granted to an offender by a person in authority | |
| cloying | Disgust or sicken (someone) with an excess of sweetness, richness, or sentiment | |
| coalesce | To come together and form one mass or whole | |
| cocksure | presumptuously or arrogantly confident | |