| cautious(careful, vague, wary, ambiguous, equivocal) |
| censor |
| censorship(calm, quiet, speech, silence, softness) |
| choke |
| circumspect(careful, vague, wary, ambiguous, equivocal) |
| clammed up(expression, careful, vague, reserved, ambiguous) |
| clamming up(expression, adjective, quiet, suppress, stifle) |
| clandestinely(clandestine, quietly, secretly, personally, privately) |
| close-lipped(adjective, quiet, reserved, secret, private) |
| closed |
| closemouthed(adjective, quiet, reserved, secret, private) |
| closet(adjective, special, intimate, secret, private) |
| conspiratorial(clandestine, underground, undisclosed, sneaky, covert) |
| covered(secret, hidden, clandestine, underground, undisclosed) |
| crafty(dishonest, cunning, deceitful, sneaky, underhanded) |
| cunning(dishonest, deceitful, sneaky, underhanded, covert) |
| dead air(expression, calm, quiet, speech, silence) |
| death(calm, quiet, speech, silence, softness) |
| discreet(special, careful, vague, ambiguous, personal) |
| dissembled(secret, hidden, clandestine, underground, undisclosed) |