| flighty(adjective, unstable, unsettled, changeable, variable) |
| indefinite(adjective, open, uncertain, doubtful, vague) |
| shilly-shallying(noun, adjective, uncertainty, indecision, vacillation) |
| trembling(noun, verb, adjective, weak, gentle) |
| undependable(adjective, uncertain, nervous, unstable, irregular) |
| unpredictable(adjective, upset, uncertain, anxious, unstable) |
| oscillation(noun, action, act, movement, delay) |
| shaky(adjective, upset, weak, delicate, uncertain) |
| doubting(verb, adjective, weak, uncertain, shy) |
| dubious(adjective, open, uncertain, nervous, dishonest) |
| infirm(adjective, weak, delicate, uncertain, unstable) |
| instability(noun, anxiety, weakness, uncertainty, shake) |
| irresolution(noun, delay, difficulty, anxiety, weakness) |
| swing(noun, action, act, movement, sign) |
| varying(adjective, unstable, irregular, unsettled, unpredictable) |
| wobbly(adjective, weak, delicate, uncertain, nervous) |
| alternating(adjective, variable, changing, changeableness, fluctuating) |
| ambivalent(adjective, open, feeble, doubtful, hesitant) |
| diffident(adjective, uncertain, nervous, shy, doubtful) |
| fluttering(verb, adjective, flickering) |