The Oxford Thesaurus An A-Z Dictionary of Synonyms - muddy adj.

1) fouled, befouled, muddied, mud-spattered, dirty, grubby, grimy, soiled, mud-caked, slimy, mucky, miry; oozy, squelchy, squashy, boggy, fenny, marshy, swampy; Formal feculent; Colloq squishy, squushy: Take off those muddy boots before you come into the house. The walk up to the house has become all muddy in the rain. 2) confused, unclear, vague, obscure, dull, dim, fuzzy, muddled, addled, mixed-up: Greg has only a muddy idea of what you're talking about. 3) drab, subdued, blurred, dingy, flat, murky, mat, washed out: The colours in her paintings look very muddy to me. --v. 4) obscure, dull, dim, confuse, mix up, befog, cloud: His explanation muddied the issue rather than clarifying it. 5) dirty, soil, begrime, smirch, besmirch, spatter, bespatter: A passing car muddied my new skirt.