| sluggish(adjective, dull, quiet, flat) |
| dull(adjective, quiet, weak, flat) |
| flat(adjective, dull, quiet, sad) |
| lifeless(adjective, dull, quiet, weak, flat) |
| blah(adjective, dull, quiet, weak, simple) |
| tedious(adjective, dull, weak, simple) |
| apathetic(adjective, dull, quiet, simple, flat) |
| dead(adjective, dull, quiet, weak, flat) |
| dopey(adjective, dull, quiet, flat) |
| down(adjective, dull, flat, sad) |
| inactive(adjective, action, dull, quiet, flat) |
| languid(adjective, dull, quiet, flat) |
| listless(adjective, dull, quiet, flat) |
| sleepy(adjective, dull, quiet, slow) |
| slothful(adjective, dull, quiet, flat) |
| stiff(adjective, dull, moderate, slow) |
| torpid(adjective, dull, quiet, flat) |
| backward(adjective, dull, moderate, stiff) |
| behind(adjective, dull, moderate, stiff) |
| behindhand(adjective, dull, moderate, stiff) |