| low(adjective, close, quiet, soft, peaceful) |
| low-pitched(adjective, close, quiet, soft, low) |
| made good(verb, expression, adjective, close, conclude) |
| maintained(adjective, secure, safe, snug, intact) |
| middle-ground |
| motionless(adjective, calm, quiet, smooth, tranquil) |
| mousy(quiet, soft, still, silent, hushed) |
| muffled(adjective, close, quiet, soft, low) |
| mum(adjective, quiet, soft, still, reticent) |
| mute(adjective, close, quiet, soft, low) |
| muted(adjective, close, quiet, soft, low) |
| nonvocal(adjective, close, quiet, soft, restrained) |
| not forthcoming(expression, quiet, shy, silent, tight-lipped) |
| not saying boo(expression, adjective, idiom, close, quiet) |
| okay(adjective, secure, safe, snug, intact) |
| on the QT(expression, idiom, sensitive, reticent, taciturn) |
| out of danger(expression, adjective, idiom, secure, safe) |
| pacific(adjective, calm, quiet, smooth, tranquil) |
| placid(adjective, calm, quiet, smooth, tranquil) |
| preserved(adjective, secure, safe, snug, intact) |