Blur

Verb

 * 1) To make indistinct or hazy, to obscure or dim.
 * 2) To smear, stain or smudge.
 * 3)  To become indistinct.

Noun

 * 1) A smear, smudge or blot
 * 2) Something that appears hazy or indistinct

Adjectives for Blur
confused; dim; pale; ineffectual; misted; pensive; wavering; shapeless; golden; retreating; vague.

Derived terms

 * motion blur

Thesaurus
aspersion, attaint, badge of infamy, bar sinister, baton, becloud, bedaub, bedim, befog, bend sinister, besmear, besmirch, besmoke, bestain, black eye, black mark, blacken, blear, bleariness, bloodstain, blot, blotch, blur distinctions, blurriness, brand, broad arrow, censure, champain, cloud, cloudiness, conceal, confound, confuse, dab, darken, darkness, daub, defocus, deform, dim, dimness, dirty, discolor, disorder, disparagement, distort, efface, eyesore, faintness, feebleness, film, filminess, fleck, flick, flyspeck, fog, fog up, fogginess, fuzz, fuzziness, half-visibility, haze, haziness, hide, imputation, indefiniteness, indistinctness, indistinguishability, jumble, jumble together, lose resolution, low profile, macula, maculation, macule, mark, mark of Cain, mask, mess up, mist, mistiness, mix, muddle, muddy, obfuscate, obscure, obscurity, odium, onus, overlook distinctions, pale, paleness, patch, pillorying, point champain, reflection, reprimand, reproach, scorch, sear, semivisibility, shadowiness, singe, slubber, slur, smear, smirch, smoke, smouch, smudge, smut, smutch, soft focus, soften, soil, spatter, speck, speckle, splash, splatter, splotch, spot, stain, stigma, stigmatism, stigmatization, stigmatize, taint, tar, tarnish, tumble, uncertainty, unclearness, unform, unplainness, unshape, vague appearance, vagueness, veil, weaken, weakness

Etymology
Cognate with to blear, the verb is from the noun.