| neuter(detached, unconcerned, removed) |
| nonliving(adjective, lifeless, inorganic) |
| obtuse(adjective, dull, heavy, stupid, impassive) |
| off(adjective, dull, moderate, low, slow) |
| old(adjective, age, aged, older, elderly) |
| out(adjective, dull, quiet, slow, heavy) |
| out of it(expression, adjective, idiom, dull, quiet) |
| paralyzed |
| procrastinating(dull, idle, sluggish, lazy, lethargic) |
| remiss(dull, idle, sluggish, lazy, lethargic) |
| reserve |
| sleepyhead(adjective, dull, quiet, weak, easy) |
| slow-moving(adjective, dull, quiet, easy, slow) |
| slumberous(adjective, dull, quiet, slow, heavy) |
| snail-paced(adjective, slow, sluggish, logy, slow-moving) |
| snoozy(adjective, dull, quiet, weak, easy) |
| soporific(quiet, heavy, tired, lethargic, sleepy) |
| spare(adjective, inaction) |
| stupefied(adjective, dull, weary, apathetic, tired) |
| stupid(adjective, dull, heavy, apathetic, sluggish) |