| spiritless(adjective, dull, weak, easy, slow) |
| stick-in-the-mud |
| stolid(adjective, dull, weary, apathetic, tired) |
| stretchy(adjective, dull, stupid, weary, apathetic) |
| stupefied(adjective, dull, stupid, idle, weary) |
| supine(adjective, dull, weak, easy, slow) |
| torpid(adjective, dull, quiet, weak, easy) |
| tortoise |
| unenthusiastic(adjective, dull, weak, easy, slow) |
| unhurried(adjective, dull, weak, easy, slow) |
| weak(adjective, dull, easy, slow, relaxed) |
| weary(adjective, dull, weak, easy, slow) |
| wimpy(adjective, dull, weak, easy, slow) |
| yawning |
| slug |
| apathetic(adjective, dull, weak, easy, slow) |
| blah(adjective, dull, quiet, weak, easy) |
| dopey(adjective, dull, quiet, weak, easy) |
| sluggard |
| appetent(adjective, languishing, lymphatic, warmblooded, energyless) |