| blurry(adjective, unclear, hazy, indistinct) |
| borderline(adjective, clear, certain, uncertain, anxious) |
| causeless(adjective, chance 2) |
| chancy(adjective, clear, certain, uncertain, anxious) |
| characterless(adjective, dull, character, ordinary, vague) |
| clouded(adjective, clear, obscure, certain, uncertain) |
| enigmatic(obscure, uncertain, doubtful, vague, dubious) |
| enigmatical(adjective, obscure, uncertain, vague, unclear) |
| fortuitous(adjective, chance 2) |
| immeasurable(adjective, constant, abundant, unrestrained, endless) |
| incidental(adjective, chance 2) |
| indefinable |
| indistinguishable(adjective, weak, obscure, dark, dim) |
| inexplicit(noun, adjective, obscure, uncertain, vague) |
| misty |
| murky |
| opaque(adjective, obscure, uncertain, vague, unclear) |
| pale(adjective, dull, drab, bashful, colourless) |
| random(adjective, chance 2) |
| unbounded(adjective, constant, abundant, unrestrained, endless) |