| cloudy(adjective, clear, certain, uncertain, vague) |
| confusing(adjective, false, uncertain, vague, unclear) |
| foggy(adjective, rough, vague, inexact, sketchy) |
| misty |
| opaque(adjective, obscure, uncertain, vague, unclear) |
| polysemous(adjective, uncertain, vague, unclear) |
| tenebrous(adjective, obscure, dark, uncertain, vague) |
| unspecific(adjective, vague, mysterious, unknown, general) |
| chancy(adjective, clear, delicate, certain, uncertain) |
| contradictory |
| double(adjective, dual-purpose, double-sided) |
| dubitable(adjective, clear, certain, uncertain, anxious) |
| fishy(adjective, uncertain, doubtful, vague, dubious) |
| ill-defined(adjective, weak, obscure, rough, dark) |
| in doubt(expression, adjective, idiom, clear, open) |
| in question(expression, adjective, idiom, clear, obscure) |
| indirect(adjective, false, dishonest, deceitful, unreliable) |
| inscrutable(adjective, dark, uncertain, blank, mysterious) |
| mystifying |
| tortuous(adjective, complex, crooked, complicated, indirect) |