| mute(adjective, close, quiet, soft, low) |
| noiseless(adjective, close, quiet, soft, low) |
| non-aggressive(adjective, peaceful) |
| paralyzed(calm, still, lifeless, inactive, inert) |
| pastoral(adjective, quiet, cool, smooth, mild) |
| phlegmatic(adjective, calm, quiet, smooth, indifferent) |
| slothful(adjective, dull, still, sluggish, lifeless) |
| slumbering(adjective, calm, gentle, sluggish, inactive) |
| somnolent(adjective, dull, idle, sluggish, lazy) |
| soundless(adjective, close, quiet, soft, low) |
| still as death(expression, idiom, quiescence) |
| stilly |
| stock-still(adjective, calm, still, inactive, inert) |
| stolid(adjective, quiet, indifferent, still, fixed) |
| taciturn(adjective, close, quiet, soft, low) |
| unexcitable(adjective, quiet, cool, still, peaceful) |
| uninvolved(adjective, quiet, indifferent, apathetic, lifeless) |
| unobtrusive(adjective, close, quiet, soft, low) |
| unoccupied(adjective, dull, idle, sluggish, lazy) |
| unperturbed |