| variation(noun, vacillation) |
| vibrating(noun, adjective, hesitant, indecisive) |
| vibration(noun, quiver, shudder, trembling, tremor) |
| whimsical(adjective, unstable, unsettled, variable) |
| oscillating(noun, adjective, hesitant, changeable, indecisive) |
| alterable(adjective, changeable, changeableness) |
| ambiguous(open, doubtful, vague, uneven, unsure) |
| blinking(verb, adjective, flickering) |
| changeableness(noun, anxiety, weakness, uncertainty, shake) |
| desultory(adjective, changeableness) |
| eccentric |
| feeble(adjective, weak, gentle, delicate, uncertain) |
| irresponsible(adjective, unstable, unsettled, unpredictable, unreliable) |
| mobile(adjective, upset, uncertain, anxious, unstable) |
| shifty(adjective, weak, uncertain, sensitive, doubtful) |
| shilly-shally(noun, adjective, delay, weakness, doubt) |
| staggering |
| uneven(adjective, unstable, shaky, unsound, unbalanced) |
| unsteadfast |
| untrustworthy(adjective, uncertain, nervous, dishonest, doubtful) |