| furtive(adjective, honest, secret, sly, concealment) |
| close(adjective, quiet, soft, low, restrained) |
| secret(adjective, quiet, mean, smooth, obscure) |
| clandestine(adjective, secret, sly, sneaky, stealthy) |
| reticent(adjective, close, quiet, soft, low) |
| reserved(adjective, close, quiet, cool, soft) |
| tight-lipped(adjective, close, quiet, soft, low) |
| uncommunicative(adjective, close, quiet, cool, soft) |
| covert(adjective, mean, smooth, secret, clandestine) |
| sneaky(adjective, honest, dishonest, secret, clandestine) |
| underhand(adjective, deceitful, secret, sly, concealment) |
| silent(adjective, close, quiet, soft, low) |
| surreptitious(adjective, mean, smooth, honest, dishonest) |
| taciturn(adjective, close, quiet, soft, low) |
| cagey(adjective, secret, tricky, sneaky, uncommunicative) |
| closemouthed(adjective, quiet, still, shy, reserved) |
| mum(adjective, quiet, restrained, reticent, silent) |
| evasive(adjective, obscure, reserved, reticent, wary) |
| close-mouthed(adjective, close, quiet, soft, low) |
| sly(adjective, honest, dishonest, cunning, secret) |