| shivering(shaky, unsteady, trembling, tremulous) |
| sick(adjective, mean, bad, weak, delicate) |
| unfixed |
| unreliable(adjective, false, uncertain, nervous, unstable) |
| weak-kneed(adjective, weak, shaky, faint, confused) |
| capricious(uneven, unbalanced, unhinged) |
| changeable(adjective, weak, uncertain, unstable, doubtful) |
| decrepit(adjective, weak, slight, thin, delicate) |
| doddering |
| doubtful(adjective, weak, uncertain, nervous, sensitive) |
| dubious(adjective, uncertain, nervous, unstable, doubtful) |
| quivery(adjective, weak, unstable, unsettled, shaky) |
| rattletrap(adjective, weak, unstable, unsettled, shaky) |
| shuddering(unsteady, trembling, shaking, vibrating) |
| staggering(adjective, shaky, faint, confused, unsteady) |
| tentative(adjective, weak, uncertain, doubtful, hesitant) |
| tumbledown(adjective, weak, unstable, unsettled, unsteady) |
| unequal(adjective, stable, irregular, uneven, unbalanced) |
| unsafe(adjective, false, uncertain, unstable, ill) |
| unsubstantial(adjective, weak, slight, thin, delicate) |