| invertebrate |
| jittery(adjective, person, feelings, emotions) |
| lackadaisical(adjective, dull, weak, easy, slow) |
| lacking(adjective, uncertain, nervous, doubtful, shaky) |
| lackluster(adjective, weary, tired, sluggish, lazy) |
| laggard(adjective, dull, stupid, idle, weary) |
| laid-back(adjective, dull, weak, easy, slow) |
| laid back(expression, adjective, lazy, slack, uncaring) |
| languishing(adjective, dull, weak, easy, slow) |
| lazy(adjective, dull, weak, easy, slow) |
| leaden(adjective, dull, weak, easy, slow) |
| leisurely(adjective, dull, weak, easy, slow) |
| lenient(adjective, weak, smooth, soft, gentle) |
| lenitive(adjective, calm, weak, smooth, soft) |
| lifeless(adjective, weary, tired, sluggish, lazy) |
| lily-livered(adjective, weak, fearful, timid, spineless) |
| listless(adjective, dull, weak, easy, slow) |
| little(adjective, light, small, insignificant, unimportant) |
| loathed(adjective, out, gross, lousy, unattractive) |
| loose |