| inaudible(adjective, dull, quiet, weak, soft) |
| inconspicuous(adjective, quiet, slight, obscure, fine) |
| muzzy |
| neutral(adjective, dull, flat, pale, bland) |
| slight(adjective, weak, soft, gentle, fine) |
| tenebrous(adjective, dull, rough, dark, gloomy) |
| thick(adjective, dull, obscure, rough, dim) |
| undetermined(adjective, obscure, rough, uncertain, doubtful) |
| unrelatable |
| woolly(adjective, uncertain, vague, unclear) |
| blind(adjective, soft, obscure, flat, dark) |
| crepuscular(adjective, dull, obscure, dark, gloomy) |
| dreamy(adjective, obscure, uncertain, vague) |
| dubious(adjective, rough, uncertain, doubtful, unsettled) |
| dusk(noun, adjective, dull, dark, gloomy) |
| enigmatic(uncertain, vague, unclear, indistinguishable) |
| general(adjective, rough, uncertain, vague, unknown) |
| hushed(adjective, quiet, weak, soft, still) |
| inaccurate(adjective, rough, vague, inexact, imprecise) |
| inexplicit(noun, adjective, uncertain, vague, unclear) |