| equivocal(adjective, clear, certain, ambiguous) |
| in doubt(adjective, idiom, clear, certain, ambiguous) |
| perplexing(adjective, hard, difficult, delicate, loose) |
| tricky(adjective, hard, difficult, uncertain, complex) |
| undecided(adjective, debatable) |
| unsettled(adjective, uncertain, doubtful, dubious, questionable) |
| ambiguous(adjective, clear, obscure, certain, uncertain) |
| apocryphal |
| at issue(adjective, idiom, clear, certain, ambiguous) |
| awkward(adjective, difficult, complex, demanding, tricky) |
| borderline(adjective, clear, certain, ambiguous, debatable) |
| controvertible |
| hypothetical(adjective, uncertainty) |
| in dispute(adjective, debatable) |
| indecisive(adjective, clear, obscure, certain, uncertain) |
| indefinite(adjective, obscure, uncertain, doubtful, dubious) |
| indeterminate(adjective, clear, obscure, certain, uncertain) |
| involved(adjective, hard, difficult, delicate, loose) |
| open to question(expression, adjective, idiom, debatable) |
| paradoxical(hard, delicate, uncertainty, uncertain, complex) |