| failing(adjective, weak, delicate, sick) |
| faulty(adjective, unhealthy, frail) |
| feverish(mean, weak, down, sick) |
| fragile(adjective, weak, slight, thin, delicate) |
| funny(mean, weak, down, sick) |
| green(mean, weak, sick, imperfect) |
| hospitalized(mean, weak, down, sick) |
| impaired(mean, weak, down, sick) |
| imperfect(adjective, mean, weak, down) |
| incurable(mean, weak, down, sick) |
| indisposed(mean, weak, sick, green) |
| infected(mean, weak, down, sick) |
| insubstantial(adjective, weak, slight, thin, delicate) |
| invalid(mean, weak, down, green) |
| laid-up(adjective, mean, weak, down) |
| laid low(expression, adjective, weak, delicate) |
| lame(adjective, weak, delicate, sick) |
| lousy(mean, weak, down, sick) |
| mean(weak, down, sick, green) |
| nauseated(mean, weak, sick, green) |