| dithering |
| doddering |
| dread(noun, fear, terror) |
| earthquake(noun, agitation, shake, tremble, upheaval) |
| faltering(adjective, weak, unstable, unsettled, unsteady) |
| flutter(noun, agitation, shake, tremble, upheaval) |
| infirm(adjective, weak, unstable, unsettled, unsteady) |
| jarred(adjective, agitated) |
| jerky(adjective, agitated, trembling, shaking, vibrating) |
| jumping(adjective, active, irregular, shaky, jarring) |
| palsied |
| precarious(adjective, weak, unstable, unsettled, unsteady) |
| quake(noun, agitation, shake, tremble, upheaval) |
| quaver(noun, agitation, shake, tremble, upheaval) |
| quavery |
| quivery(weak, unstable, unsettled, unsteady, trembling) |
| rickety(adjective, weak, unstable, unsettled, shaky) |
| rocking(noun, verb, fit, seizure, tremor) |
| scare(noun, fear, terror, shiver) |
| staggering(adjective, shaky, unsteady, trembling, wobbly) |