| slothful(dull, idle, sluggish, lazy, motionless) |
| slow(adjective, dull, quiet, cool, smooth) |
| small(adjective, sounds) |
| smooth(adjective, quiet, cool, mild, still) |
| solemn(adjective, calm, quiet, reasonable, gentle) |
| somber(adjective, calm, quiet, reasonable, sensible) |
| somnolent(adjective, dull, idle, sluggish, lazy) |
| soothing(adjective, quiet, cool, smooth, mild) |
| sound(adjective, calm, quiet, reasonable, sensible) |
| stable(adjective, dull, idle, sluggish, lazy) |
| staid(adjective, calm, quiet, reasonable, sensible) |
| static(adjective, dull, idle, sluggish, lazy) |
| steady(adjective, calm, quiet, soft, reasonable) |
| still(adjective, dull, quiet, cool, smooth) |
| stormless(adjective, quiet, cool, smooth, slow) |
| tolerant(adjective, calm, soft, reasonable, gentle) |
| toned-down(adjective, understated, relieved, unlit, subfusc) |
| torpid(dull, sluggish, lazy, motionless, unmoving) |
| unassuming(adjective, quiet, simple, plain, modest) |
| undisturbed(adjective, quiet, cool, smooth, mild) |