| illogical(adjective, false, unstable, ill, shaky) |
| impaired(adjective, mean, weak, sick, feeble) |
| imperfect(adjective, mean, weak, down, ill) |
| in a blue funk(upset, resentment, frustration) |
| in a trance(upset, resentment, frustration) |
| in blue funk(upset, resentment, frustration) |
| in the dumps(upset, resentment, frustration) |
| incongruous(adjective, false, unstable, ill, shaky) |
| incurable(adjective, mean, weak, sick, feeble) |
| indisposed(adjective, mean, weak, sick, green) |
| infected(adjective, mean, weak, sick, feeble) |
| insecure(adjective, false, unstable, ill, shaky) |
| insubstantial(adjective, weak, false, unstable, ill) |
| lackluster(adjective, mean, weak, thin, ill) |
| laid-low(adjective, mean, weak, thin, ill) |
| laid-up(adjective, mean, bad, weak, delicate) |
| laid low(expression, adjective, weak, delicate, ill) |
| languid(adjective, mean, weak, thin, ill) |
| lousy(adjective, mean, weak, down, ill) |
| low(adjective, mean, weak, thin, ill) |