| sluggish(adjective, dull, hard, weak, easy) |
| languid(adjective, action, dull, beat, weak) |
| leaden(adjective, action, dull, hard, weak) |
| lumpish(adjective, hard, difficult, slow, complex) |
| listless(adjective, action, dull, beat, weak) |
| lethargic(adjective, dull, weak, easy, slow) |
| lackadaisical(adjective, action, dull, weak, easy) |
| lazy(adjective, dull, weak, easy, slow) |
| torpid(adjective, dull, weak, easy, flat) |
| inactive(adjective, dull, weak, easy, slow) |
| inert(adjective, dull, weak, moving, easy) |
| indolent(adjective, dull, slow, careless, relaxed) |
| apathetic(adjective, dull, weak, easy, flat) |
| slow(adjective, dull, weak, easy, careless) |
| slothful(adjective, dull, flat, low, sad) |
| spiritless(adjective, action, dull, weak, easy) |
| idle(adjective, dull, careless, indifferent, still) |
| phlegmatic(adjective, dull, weak, easy, slow) |
| passive(adjective, dull, careless, indifferent, still) |
| dull(adjective, flat, low, sad, slow) |