| ill(adjective, weak, sick, feeble, unwell) |
| below par(expression, weak, sick, feeble, unwell) |
| down(weak, sick, feeble, unwell, sickly) |
| indisposed(weak, sick, feeble, unwell, sickly) |
| laid low(expression, enervated, senescent, irresilient) |
| rocky(weak, sick, feeble, unwell, sickly) |
| sick(weak, feeble, unwell, sickly, qualmish) |
| unwell(weak, sick, feeble, sickly, qualmish) |
| ailing(sick, unwell, enervated, sickly, qualmish) |
| bad |
| diseased(weak, sick, feeble, unwell, sickly) |
| down with(expression, weak, sick, feeble, enervated) |
| faint |
| infirm(sick, unwell, enervated, sickly, senescent) |
| off-color |
| out of sorts(expression, idiom) |
| poorly(sick, unwell, sickly) |
| seedy |
| sick as a dog(expression, idiom, weak, sick, feeble) |
| under the weather(expression, idiom, weak, sick, feeble) |