| calm(quiet, mild, controlled, self-possessed) |
| calm and collected(expression, idiom, calm, quiet, reasonable) |
| chilled(adjective, calm, quiet, reasonable, mild) |
| clammed up(expression, adjective, quiet, soft, low) |
| close-mouthed(adjective, quiet, soft, low) |
| conservative(adjective, calm, quiet, reasonable, mild) |
| controlled(adjective, calm, quiet, reasonable, gentle) |
| cool(calm, quiet, mild, controlled, self-possessed) |
| corked up(expression, adjective, calm, quiet, reasonable) |
| could hear a pin drop(expression, adjective, idiom, quiet, soft) |
| discreet(adjective, calm, quiet, reasonable, mild) |
| hushed(adjective, quiet, soft, gentle, low) |
| hushful(adjective, quiet, soft, low, silenced) |
| in charge(expression, adjective, calm, quiet, reasonable) |
| in check(expression, adjective, calm, quiet, reasonable) |
| inaudible(adjective, quiet, soft, low) |
| laid-back(calm, quiet, reasonable, mild, controlled) |
| low-pitched(adjective, quiet, soft, low) |
| mild(calm, quiet, reasonable, controlled, self-possessed) |
| moderate(calm, quiet, reasonable, mild, controlled) |