| buttoning up(verb, expression, adjective, quiet, reserved) |
| clam up(verb, expression, calm, close, quiet) |
| clammed up(verb, expression, adjective, close, quiet) |
| close(verb, adjective, quiet, reserved, secret) |
| close-lipped(adjective, quiet, reserved, secret, private) |
| closemouthed(adjective, quiet, reserved, secret, private) |
| dummied up(verb, expression, adjective, close, quiet) |
| dummy up(verb, expression, calm, close, quiet) |
| hidden(adjective, quiet, reserved, secret, private) |
| hush-hush(verb, adjective, quiet, suppress, stifle) |
| patch things up(verb, expression, idiom, calm, quiet) |
| retired(adjective, quiet, reserved, secret, private) |
| secluded(adjective, quiet, reserved, secret, private) |
| secretive(adjective, quiet, reserved, secret, private) |
| silent(adjective, quiet, reserved, secret, private) |
| tight-lipped(adjective, quiet, reserved, secret, private) |
| tight chops(expression, adjective, quiet, reserved, secret) |
| uncommunicative(adjective, quiet, reserved, secret, private) |
| unforthcoming(adjective, quiet, reserved, secret, private) |
| be calm(quiet, inactivate) |