| problematic(adjective, clear, open, delicate, certain) |
| spineless(adjective, weak, uncertain, inferior, unstable) |
| undependable(adjective, uncertain, nervous, unstable, doubtful) |
| unsteady(adjective, weak, delicate, uncertain, unstable) |
| vague(adjective, open, obscure, uncertain, doubtful) |
| faltering(adjective, weak, uncertain, shy, doubtful) |
| inconsistent(adjective, unstable, unsettled, changeable, variable) |
| infirm(adjective, weak, thin, delicate, uncertain) |
| mutable(adjective, unstable, unsettled, changeable, fickle) |
| shy(adjective, irresolute) |
| unpredictable(adjective, uncertain, unstable, shy, doubtful) |
| weak(adjective, thin, delicate, uncertain, nervous) |
| whimsical(adjective, unstable, unsettled, changeable, variable) |
| adrift(adjective, motiveless) |
| dubitable(adjective, clear, certain, uncertain, anxious) |
| fitful(adjective, unstable, doubtful, unsettled, vague) |
| flitting(adjective, capricious, irresolute, motiveless) |
| irregular(adjective, unstable, doubtful, unsettled, vague) |
| irresponsible(adjective, unstable, unsettled, variable, capricious) |
| mercurial(adjective, unstable, unsettled, changeable, variable) |