| shrouded(cover, obscure, dark, unknown, equivocal) |
| slick(adjective, false, misleading, illusory) |
| slippery(adjective, weak, delicate, false, uncertain) |
| strange(obscure, deep, unknown, clandestine, underground) |
| touch-and-go(uncertain, shaky, unclear, unlikely, questionable) |
| unaccountable(adjective, obscure, doubtful, vague, unclear) |
| unconfirmed(uncertain, doubtful, shaky, vague, dubious) |
| undecided(adjective, open, uncertain, doubtful, unsettled) |
| uneasy(uncertain, shaky, unclear, unlikely, questionable) |
| unexplicit(adjective, vague, unclear, misleading, incoherent) |
| unforeseeable(doubtful, vague, unsure) |
| unknowable(adjective, mysterious, hidden, incoherent, unfathomable) |
| unlikely(shaky, unpromising) |
| unpredictable(doubtful, vague, uneven, unsure, unbalanced) |
| unreadable(incoherent, unfathomable, incomprehensible, enigmatic, inarticulate) |
| vacillating(doubtful, vague, uneven, unsure, unbalanced) |
| variable(doubtful, vague, uneven, unsure, unbalanced) |
| wandering(verb, rambling, incidental, circuitous, tortuous) |
| wishy-washy |
| zigzag(crooked, rambling, turning, incidental, circuitous) |