| faulty(adjective, false, ill, insane, unhealthy) |
| flexible(adjective, loose, feeble, sloppy, changeable) |
| flickery |
| fragile(adjective, false, uncertain, unstable, ill) |
| hesitant(adjective, weak, uncertain, feeble, doubtful) |
| indefinite(adjective, flexible, adaptable) |
| jerking |
| light(shaky, faint, impulsive, confused, unpredictable) |
| loose(adjective, free, feeble, vulnerable, mobile) |
| occasional(adjective, unreliable, uneven, variable, erratic) |
| off-balance(adjective, rough, odd, uneven, crooked) |
| quaking(adjective, weak, active, unstable, irregular) |
| random(adjective, erratic, haphazard) |
| shivering(adjective, trembling) |
| shuddering(adjective, trembling) |
| skittish(adjective, unstable, unsettled, variable, capricious) |
| slack(adjective, loose, inactive, baggy) |
| spastic |
| temperamental(adjective, change, weak, continue, delicate) |
| transient(adjective, anxious, nervous, unsettled, agitated) |