| rocky(adjective, mean, weak, thin, green) |
| rotten(adjective, mean, weak, down, ill) |
| run-down(adjective, weak, thin, sick, feeble) |
| seedy(adjective, mean, weak, thin, ill) |
| shaky(adjective, unstable, ill, sick, insane) |
| sickish(adjective, mean, weak, thin, ill) |
| suffering(adjective, mean, bad, weak, delicate) |
| tottering(adjective, mean, weak, down, ill) |
| unbacked(adjective, false, unstable, ill, shaky) |
| unbalanced(adjective, false, unstable, ill, shaky) |
| under medication(expression, adjective, mean, bad, weak) |
| under the weather(expression, adjective, idiom, mean, green) |
| unhinged(adjective, false, unstable, ill, shaky) |
| unsafe(adjective, false, unstable, ill, shaky) |
| unstable(adjective, false, ill, shaky, insane) |
| unsteady(adjective, false, unstable, ill, shaky) |
| unsubstantial(adjective, weak, false, unstable, ill) |
| valetudinarian |
| wan(adjective, mean, weak, thin, ill) |
| weakly |