| invalid(adjective, feature, state, mean, weak) |
| disabled(adjective, feature, state, hurt, weak) |
| faulty(adjective, feature, state, condition, situation) |
| illogical(adjective, feature, state, condition, situation) |
| incorrect(adjective, feature, state, condition, situation) |
| void(adjective, feature, state, condition, situation) |
| feeble(adjective, dull, mean, bad, strong) |
| weak(adjective, dull, change, mean, bad) |
| frail(adjective, mean, bad, strong, light) |
| sickly(adjective, dull, weak, easy, disease) |
| decrepit(adjective, strong, light, weak, slight) |
| unhealthy(adjective, mean, bad, weak, disease) |
| ailing(adjective, mean, bad, weak, thin) |
| ill(adjective, mean, weak, sick, green) |
| unsound(adjective, strong, light, weak, slight) |
| debilitated(adjective, mean, bad, weak, thin) |
| fragile(adjective, strong, light, weak, slight) |
| shaky(adjective, change, strong, weak, slight) |
| delicate(adjective, mean, bad, strong, weak) |
| rickety(adjective, mean, bad, weak, slight) |