| silence(noun, verb, calm, dull, quiet) |
| under-the-table(adjective, secret, private, hidden, clandestine) |
| undisclosed(adjective, personal, clandestine, underground, confidential) |
| arcane(intimate, secret, private, clandestine, underground) |
| close(adjective, quiet, reserved, intimate, secret) |
| cut short(verb, expression, calm, dull, quiet) |
| huggermugger(adjective, adverb, show, secret, secretly) |
| hush(noun, verb, calm, dull, quiet) |
| off the record(expression, adjective, idiom, intimate, secret) |
| privy(adjective, intimate, secret, private, hidden) |
| shush(verb, calm, dull, quiet, moderate) |
| sit on(verb, expression, calm, dull, quiet) |
| still(verb, calm, dull, quiet, suppress) |
| top secret(noun, expression, adjective, secret, restricted) |
| auricular(adjective, show) |
| backstairs(clandestine, underground, undisclosed) |
| censored |
| choke off(verb, expression, calm, dull, quiet) |
| clam(verb, calm, dull, quiet, suppress) |
| clam up(expression, calm, dull, quiet, suppress) |