| weak(adjective, strong, light, slight, disease) |
| rickety(adjective, weak, slight, delicate, uncertain) |
| feeble(adjective, strong, light, weak, slight) |
| infirm(adjective, strong, light, weak, slight) |
| frail(adjective, strong, light, weak, slight) |
| fragile(adjective, strong, light, weak, slight) |
| flimsy(adjective, strong, light, weak, slight) |
| shaky(adjective, weak, slight, weakness, thin) |
| debilitated(adjective, weak, thin, delicate, uncertain) |
| delicate(adjective, strong, weak, slight, thin) |
| insubstantial(adjective, strong, light, weak, slight) |
| unsubstantial(adjective, strong, light, weak, slight) |
| unsound(adjective, strong, light, weak, slight) |
| anile(adjective, weak, delicate, sick) |
| sickly(adjective, weak, thin, delicate, uncertain) |
| enfeebled(adjective, weak, thin, delicate) |
| tottering(adjective, unstable, shaky, insane) |
| ailing(adjective, weak, thin, delicate, unstable) |
| unstable(adjective, weak, delicate, false) |
| unsteady(adjective, false, uncertain, unstable) |