blear

bleary, blurry, dim, faint, foggy, fuzzy, gauzy, hazy, indefinite, indistinct, indistinguishable, misty, murky, nebulous, obscure, opaque, pale, shadowy, unclear, undefined, undetermined, vague

becloud, bedim, befog, blacken, blur, cloud, darken, dim, fog, fuzz (up), haze, mist, obscure, overcast, overcloud, overshadow, shadow, shroud