| lazy(adjective, dull, weak, easy, slow) |
| leaden(adjective, dull, weak, easy, slow) |
| leisurely(adjective, dull, weak, easy, slow) |
| lifeless(adjective, dull, flat, warm, low) |
| limp(adjective, dull, weak, easy, flat) |
| loth |
| loveless |
| low(adjective, dull, flat, sad, indifferent) |
| low-key(adjective, calm, restrained, subdued, impassive) |
| malcontent(adjective, difficult, awkward, forced, averse) |
| melancholic(adjective, dull, flat, low, sad) |
| melancholy(adjective, dull, flat, low, sad) |
| mopy(adjective, dull, flat, low, sad) |
| muted(adjective, unfriendly, icy, offhand) |
| naysaying(bad, weak, gloomy) |
| nebbish(adjective, dull, weak, easy, slow) |
| neutralizing(bad, weak, gloomy) |
| nirvanic |
| not enthusiastic(expression, adjective, idiom, indifferent, apathetic) |
| nugatory(bad, weak, gloomy) |