| lifeless(adjective, dull, quiet, flat, low) |
| phlegmatic(adjective, dull, quiet, easy, slow) |
| faineant(adjective, action, dull, slow, careless) |
| passive(adjective, dull, quiet, careless, indifferent) |
| remiss(adjective, dull, careless, thoughtless, sluggish) |
| dilatory(adjective, dull, quiet, slow, careless) |
| laggard(noun, adjective, dull, quiet, easy) |
| half ass |
| indifferent(adjective, dull, flat, low, sad) |
| lax(adjective, dull, slow, careless, indifferent) |
| leaden(adjective, dull, quiet, easy, slow) |
| do-nothing(adjective, action, dull, informal, idle) |
| leisurely(adjective, lethargic) |
| tardy(adjective, dull, quiet, easy, slow) |
| tired(adjective, dull, careless, indifferent, idle) |
| unhurried(adjective, lethargic) |
| dopey(adjective, dull, flat, low, sad) |
| lumpish(adjective, dull, slow, heavy, sluggish) |
| spiritless(adjective, dull, sad, careless, indifferent) |
| heavy(adjective, dull, quiet, easy, slow) |