| grow dim(verb, expression, dirty, dim, blot) |
| lour |
| mar(dull, stain, color, fade, discolor) |
| mark(dull, stain, color, fade, discolor) |
| mask(verb, cover, obscure, confuse, hide) |
| mortify(verb, upset, trouble, dull, reduce) |
| opaque |
| oppress(verb, upset, trouble, dull, reduce) |
| pale(verb, dull, reduce, lower, dirty) |
| perplex(upset, trouble, obscure, confuse, conceal) |
| perturb(verb, upset, trouble, dull, reduce) |
| redden |
| screen(verb, cover, obscure, confuse, hide) |
| sink |
| smear(dull, stain, color, fade, discolor) |
| soil(dull, dirty, stain, color, fade) |
| spoil(dull, stain, discolor) |
| sully(verb, dull, dirty, stain, color) |
| taint(dull, stain, discolor) |
| tone down(verb, expression, phrasal verb, cover, moderate) |