| savorless |
| savourless |
| semi-matte |
| shadowy(adjective, soft, obscure, flat, dark) |
| slide |
| sober(adjective, soft, obscure, flat, dark) |
| softened(adjective, soft, obscure, flat, dark) |
| somber(adjective, soft, obscure, flat, dark) |
| sombre(adjective, dull, flat, boring, lifeless) |
| sooty(adjective, soft, obscure, flat, dark) |
| spiritless(adjective, dull, weak, dead, tedious) |
| stale(adjective, dull, weak, dead, tedious) |
| subfusc(adjective, soft, obscure, flat, dark) |
| tasteless(adjective, dull, weak, dead, tedious) |
| toned-down(adjective, soft, obscure, flat, dark) |
| transparency |
| unimaginative(adjective, dull, flat, boring, lifeless) |
| uninspired(adjective, dull, flat, boring, lifeless) |
| unlit(adjective, soft, obscure, flat, dark) |
| unpalatable(adjective, dull, weak, dead, tedious) |