| half and half(adjective, doubt, unstable, shy, unready) |
| half hearted(adjective, doubt, unstable, shy, unready) |
| halfhearted(adjective, doubt, unstable, shy, unready) |
| haywire(adjective, shake, unstable, unsteady) |
| hazy(adjective, uncertain, unclear, unbalanced, indefinite) |
| head-scratcher(expression, idiom, doubtful, irresolute, vacillating) |
| horrent(adjective, shake, unsteady, oscillate) |
| iffy(adjective, doubt, varying, oscillating, wobbling) |
| ill-defined(adjective, uncertain, unclear, unbalanced, indefinite) |
| impermanent(adjective, unstable, erratic, unsteady) |
| imprecise(adjective, uncertain, unclear, unbalanced, indefinite) |
| inconsistent(adjective, unstable, erratic, unsteady) |
| indefinable(adjective, uncertain, unclear, unbalanced, indefinite) |
| indefinite(adjective, uncertain, unclear, unbalanced) |
| indescribable(adjective, uncertain, unclear, unbalanced, indefinite) |
| inexplicit(adjective, uncertain, unclear, unbalanced, indefinite) |
| infinite(adjective, uncertain, unclear, unbalanced, indefinite) |
| infinitive(adjective, uncertain, unclear, unbalanced, indefinite) |
| infirm of purpose(adjective, doubt, unstable, shy, unready) |
| insecure(adjective, uncertain, doubtful, dubious) |