| cloddish(adjective, dull) |
| crestfallen(adjective, blue, sad, depression, woe) |
| desolate(adjective, blue, sad, depression, woe) |
| despondent(adjective, blue, sad, depression, woe) |
| dip(verb, fade, wane, dwindle, fizzle) |
| distant(adjective, dull, weak, soft, gentle) |
| dun(adjective, dull, soft, obscure, flat) |
| efface |
| extinguish(verb, obscure, conceal, overshadow) |
| funereal(adjective, dull, obscure, dark, gloomy) |
| ghastly(adjective, dull, light, soft, poor) |
| goofy(adjective, stupid) |
| grim(adjective, blue, sad, depression, woe) |
| haze(verb, cover, reduce, lower, obscure) |
| heavy(gloomy, gray, overcast) |
| humdrum(adjective, boring, uneventful) |
| imprecise(adjective, vague, unclear, hazy, indistinct) |
| inconspicuous(adjective, quiet, plain, unclear, hidden) |
| indiscernible |
| intangible(adjective, indefinite, hazy, insubstantial, indistinct) |