| dim(verb, adjective, dull, quiet, cover) |
| dark(adjective, secret, hidden, mysterious, unclear) |
| unclear(adjective, dull, clear, hard, weak) |
| vague(adjective, dull, clear, weak, rough) |
| hazy(adjective, dull, clear, weak, soft) |
| shadowy(adjective, dull, clear, weak, soft) |
| murky(adjective, dull, light, soft, flat) |
| hide(verb, close, cover, check, show) |
| cloudy(adjective, dull, clear, soft, flat) |
| indefinite(adjective, dull, clear, rough, strange) |
| indistinct(adjective, dull, quiet, clear, weak) |
| conceal(verb, close, cover, show, block) |
| ambiguous(adjective, cover, clear, rough, dark) |
| cloud(noun, verb, upset, trouble, cover) |
| hidden(verb, adjective, quiet, cover, hard) |
| veil(verb, close, cover, shade, block) |
| opaque(adjective, dull, hard, soft, flat) |
| abstruse(noun, adjective, hard, sharp, difficult) |
| cryptic(adjective, cover, sharp, difficult, dark) |
| gloomy(adjective, dull, flat, dark, dirty) |