| middle-of-the-road(adjective, calm, soft, reasonable, gentle) |
| mild(adjective, calm, quiet, cool, smooth) |
| minimalist(modest, inconspicuous) |
| monotonous(adjective, calm, soft, reasonable, gentle) |
| mothballed(adjective, dull, idle, sluggish, lazy) |
| motionless(adjective, dull, quiet, cool, smooth) |
| muffled(adjective, subdued, understated, unglamorous, unspectacular) |
| neutral(adjective, calm, quiet, cool, soft) |
| no-nonsense(adjective, calm, quiet, reasonable, sensible) |
| on hold(expression, adjective, dull, idle, sluggish) |
| ordinary(adjective, quiet, reasonable, sensible, plain) |
| ossified(adjective, dull, idle, sluggish, lazy) |
| out of action(expression, adjective, idiom, dull, idle) |
| out of commission(expression, adjective, idiom, dull, idle) |
| out of service(expression, adjective, idiom, dull, idle) |
| out of work(expression, adjective, idiom, dull, idle) |
| pacific(adjective, calm, quiet, cool, smooth) |
| passive(dull, sluggish, lazy, motionless, unmoving) |
| pastoral(adjective, quiet, cool, smooth, mild) |
| peaceful dull(expression, calm, quiet, reasonable, dark) |