Dull, Dun, Dusty, Fainthearted, Fearful, Fearing, Fearsome, Flat, Funky, Glaucous, Grey, Grizzled, Grizzly, Hushed, Inarticulate, Inaudible, Intimidated, Jumpy, Leaden, Livid, Mouselike, Mousey, Nervous, Noiseless, Panicky, Pearl, Pearly, Plain, Quiescent, Quiet, Ratty, Rodent, Sad, Scary, Shaky, Shamefaced, Shivery, Shrinking, Shy, Silent, Silver, Silvered, Silvery, Sissy, Skittish, Smoky, Sober, Soft, Soundless, Stammering, Steely, Still, Timid, Trembling, Tremulous, Unarticulated, Afraid, Ashen, Ashy, Bashful, Brown, Brownish, Chicken, Confused, Conscious, Coward, Cowardly, Cowed, Cowering, Coy, Dapple, Dappled, Daunted, Demure, Diffident, Dingy, Dismal, Dismayed, Drab, Dreary, Unmanly, Unmanned, Unpronounced, Unvoiced, Verminous, Weak, Whist, Yellow