| obscure(verb, adjective, dull, soft, flat) |
| tarnish(verb, dull, hurt, reduce, diminish) |
| dull(verb, adjective, reduce, diminish, lower) |
| indistinct(adjective, dull, soft, obscure, flat) |
| dark(adjective, dull, soft, obscure, flat) |
| gloomy(adjective, dull, dark, dirty) |
| cloud(verb, dull, cover, hurt, reduce) |
| blur(verb, dull, cover, hurt, reduce) |
| fog(noun, verb, cover, reduce, lower) |
| pale(verb, adjective, dull, reduce, diminish) |
| becloud(verb, cover, reduce, lower, obscure) |
| befog(verb, dull, cover, reduce, lower) |
| fade(verb, dull, reduce, diminish, lower) |
| leaden(adjective, dull, soft, obscure, flat) |
| darken(verb, dull, cover, reduce, lower) |
| overcast(verb, adjective, dull, cover, soft) |
| blind(verb, adjective, cover, soft, obscure) |
| clear(dull, dissolve) |
| discolor(verb, dull, hurt, harm, spoil) |
| dusky(adjective, dull, soft, obscure, flat) |