| pale(adjective, dull, weak, soft, gentle) |
| unintelligible(adjective, hard, obscure, rough, difficult) |
| imprecise(adjective, clear, rough, uncertain, vague) |
| indecisive(adjective, clear, open, certain, uncertain) |
| indistinguishable(adjective, obscure, vague, hazy, indistinct) |
| undecipherable(adjective, illegible) |
| undefined(adjective, weak, obscure, rough, dark) |
| unsettled(adjective, clear, open, rough, uncertain) |
| baffling(adjective, hard, obscure, difficult, loose) |
| inarticulate(adjective, still, faint, hazy, unable) |
| muddy(adjective, obscure, dark, uncertain, vague) |
| mystifying(adjective, hard, delicate, unfathomable, opaque) |
| undetermined(adjective, open, rough, determined, uncertain) |
| veiled(adjective, semitransparent) |
| weak(adjective, dull, soft, gentle, dark) |
| questionable(adjective, clear, rough, certain, uncertain) |
| borderline(adjective, clear, open, certain, uncertain) |
| dull(adjective, weak, soft, gentle, obscure) |
| feeble(adjective, weak, pale, faded) |
| inexact(adjective, open, weak, obscure, rough) |