1) Begrimed 2) Causing dejection 3) Dark and dreary 4) Dark and dull 5) Dark, dull and dirty 6) Dark, dull, and dirty 7) Darkened with grime and smoke 8) Dirty 9) Dirty-looking 10) Discolored by impurities 11) Dismal 12) Dismal and drab 13) Drab & poorly lit 14) Drab and dismal 15) Drab-looking 16) Dull and dirty 1) Begrimed 2) Cheerless 3) Dirty 4) Dismal 5) Drab 6) Drear 7) Dreary 8) Dull 9) Gray 10) Grimy 11) Grubby 12) Grungy 13) Impure 14) Muddied 15) Ourie 16) Soiled 17) Subfusc 18) Uncheerful 19) Unclean 
• (superl.) Soiled; sullied; of a dark or dusky color; dark brown; dirty. • (n.) Alt. of Dinghy
Din'gy adjective [ Compar. Dingier ; superl. Dingiest .] [ Prob. from dung . Confer Dungy .] Soiled; sullied; of a dark or dusky color; dark brown; dirty. 'Scraps of dingy paper.' Macaulay. 
[adj] - depressing in character or appearance
of a dark, dull, or dirty color or aspect; lacking brightness or freshness. · shabby; dismal.
[Intelligent words] thickly covered with ingrained dirt or soot