| inconsiderable(adjective, calm, soft, reasonable, gentle) |
| indolent(dull, idle, sluggish, lazy, motionless) |
| inhibited(adjective, calm, quiet, sensible, dark) |
| inoperative(adjective, dull, idle, sluggish, lazy) |
| intermediate(adjective, reasonable, sensible, restrained, modest) |
| jobless(adjective, dull, idle, sluggish, lazy) |
| judicious(adjective, calm, soft, reasonable, gentle) |
| latent(adjective, dull, idle, sluggish, lazy) |
| lax(adjective, dull, idle, sluggish, lazy) |
| lazy(adjective, dull, idle, sluggish, passive) |
| lethargic(dull, sluggish, lazy, motionless, unmoving) |
| levelheaded(adjective, calm, quiet, cool, reasonable) |
| limited(adjective, calm, soft, reasonable, gentle) |
| limp(adjective, dull, idle, sluggish, lazy) |
| low-pitched(adjective, subdued, understated, unglamorous, unspectacular) |
| low-profile(quiet, plain, modest, imperceptible, discreet) |
| low key(expression, adjective, smooth, mild, peaceful) |
| lucid(adjective, calm, quiet, reasonable, sensible) |
| measured(adjective, calm, soft, reasonable, gentle) |
| mellow(adjective, quiet, gentle, restrained, sober) |