| insubstantial(adjective, strong, light, weak, slight) |
| irresolute(adjective, weak, delicate, uncertain) |
| unsteady(adjective, change, strong, weak, uncertain) |
| enfeebled(adjective, weak, thin, delicate) |
| indisposed(adjective, mean, bad, weak, thin) |
| lame(adjective, hurt, weak, disease, thin) |
| unstable(adjective, change, strong, weak, delicate) |
| unsubstantial(adjective, strong, light, weak, slight) |
| wobbly(adjective, change, mean, bad, strong) |
| uncertain(adjective, weak, sick, feeble) |
| wavering(adjective, weak, delicate, uncertain, unstable) |
| failing(adjective, weak, thin, delicate) |
| languid(adjective, dull, weak, easy, weakness) |
| poorly(adjective, adverb, mean, sick) |
| rotten(adjective, mean, bad, weak, weakness) |
| anemic(adjective, weak, delicate, uncertain) |
| imperfect(adjective, mean, weak, down) |
| pale(adjective, bad, weak, thin) |
| peaky(adjective, weak, thin, sick) |
| unreliable(adjective, false, loose, sick) |