Merriam-Webster Collegiate Dictionary - turbid

 adjective  Etymology: Latin ~us confused, ~, from turba confusion, crowd, probably from Greek tyrbe confusion  Date: 1626  1.  a. thick or opaque with or as if with roiled sediment a ~ stream  b. heavy with smoke or mist  2.  a. deficient in clarity or purity ; foul, muddy ~ depths of degradation and misery — C. I. Glicksberg  b. characterized by or producing obscurity (as of mind or emotions) an emotionally ~ response  • ~ity noun  • ~ly adverb  • ~ness noun