| ambiguous(adjective, rough, uncertainty, uncertain, doubtful) |
| dull(adjective, quiet, weak, soft, gentle) |
| imperceptible(adjective, dull, hard, weak, soft) |
| weak(adjective, dull, soft, gentle, obscure) |
| bleary(adjective, dull, clear, obscure, rough) |
| indistinguishable(adjective, slight, obscure, fine, small) |
| muffled(adjective, dull, quiet, weak, soft) |
| undefined(adjective, obscure, rough, uncertainty, uncertain) |
| pale(adjective, dull, weak, soft, gentle) |
| clouded(adjective, dull, obscure, dark, gloomy) |
| inexact(adjective, obscure, rough, uncertain) |
| shady(adjective, dull, cool, obscure, dark) |
| unintelligible(adjective, obscure, rough, uncertain, doubtful) |
| doubtful(adjective, obscure, rough, uncertain) |
| feeble(adjective, dull, weak, soft, gentle) |
| low(adjective, dull, quiet, weak, soft) |
| muddy(adjective, dull, soft, obscure, flat) |
| opaque(adjective, dull, soft, obscure, flat) |
| filmy(adjective, cloudy, murky, hazy) |
| muted(adjective, dull, close, quiet, weak) |