| bashful(quiet, soft, silent) |
| buttoned up(expression, adjective, close, quiet, soft) |
| checked(quiet, soft, silent) |
| clammed up(expression, adjective, close, quiet, soft) |
| close(quiet, soft, silent) |
| closed up(expression, adjective, close, quiet, soft) |
| closemouthed(quiet, soft, silent) |
| confidentiality(adjective, hushed, wordless) |
| curbed(quiet, soft, silent) |
| dumb(quiet, soft, silent) |
| dummied up(expression, adjective, close, quiet, soft) |
| faint(quiet, soft, silent) |
| hush(adjective, close, quiet, soft, silent) |
| hushed(adjective, quiet, soft, silent, muted) |
| iced(adjective, close, quiet, soft, silent) |
| inarticulate(quiet, soft, silent) |
| incoherent(quiet, soft, silent) |
| inconversable(adjective, close, quiet, soft, silent) |
| indistinct(quiet, soft, silent) |
| inhibited(quiet, soft, silent) |