| shade(noun, darkness, ghost) |
| undefined(adjective, weak, obscure, dark, dim) |
| amorphous(adjective, unclear, indistinct, indistinguishable) |
| blear(adjective, clear) |
| cadaverous(adjective, pale, supernatural, wasted, ghastly) |
| depressing(adjective, dull, dark, gloomy, miserable) |
| despondent(adjective, sorrow, depress, sadness, emotion) |
| eerie(adjective, sorrow, depress, sadness, emotion) |
| feeble(adjective, dull, weak, soft, gentle) |
| general(adjective, rough, vague, unknown, unclear) |
| grave(adjective, sorrow, depress, sadness, emotion) |
| hidden(adjective, secret, unseen) |
| imperceptible(adjective, hard, weak, faint, pale) |
| imponderable(adjective, negative, heavenly, imperceptible, vacant) |
| incorporeal(adjective, heavenly, insubstantial, imperceptible, nonmaterial) |
| lurid(adjective, dull, dark, sorrow, gloomy) |
| nonphysical(adjective, heavenly, immaterial, incorporeal, nonmaterial) |
| pitchy(adjective, dull, dark, gloomy, dim) |
| shadow(noun, darkness) |
| sinister(adjective, sorrow, depress, sadness, emotion) |