Blot

Noun

 * 1) A blemish, spot or stain made by a coloured substance.
 * 2)  A stain on someone's reputation or character; a disgrace.
 * 3)  The Southern blot analysis (and derived Northern and Western) analytical techniques.
 * 4)  an exposed piece in backgammon.

Verb

 * 1)  to cause a blot (on something) by spilling a coloured substance
 * 2)  to soak up, or absorb liquid
 * 3) to hide, obscure or obliterate something

Adjectives for Blot
unsightly; tarnished; shadowy; foul; indelible; wrinkled; messy; adulterate.

Adverbs for Blot
remorselessly; indelibly; blackly; permanently; finally; eventually; carelessly; frequently.

Synonyms for Blot
blacken, smudge, dirty, soil, foul, stain, smirch, blotch, erase, cancel, expunge.

Antonyms for Blot
whiten, purify, wash, cleanse, restore, record.

Derived terms

 * blotting paper
 * blot out

Thesaurus
smudge, smut, smutch, soak in, soak up, soil, soilage, soilure, soot, sorb, spatter, speck, speckle, splash, splatter, splotch, spoil, sponge, sponge out, spot, stain, stigma, stigmatism, stigmatization, stigmatize, strike out, sully, sun, sun-dry, swab, swill up, taint, take in, take up, tarnish, teratism, torrefy, towel, transgress, uglify, ugly duckling, vilify, washing out, weazen, wipe, wipe out, wiping out, witch, wither, wizen, absorb, adsorb, air-dry, anhydrate, annihilate, aspersion, assimilate, attaint, baboon, badge of infamy, bag, bake, bar sinister, baton, bedarken, bend sinister, besmirch, bespatter, bespeckle, bespot, bestain, black, black eye, black mark, blacken, blackwash, blemish, bloodstain, blot out, blot up, blotch, blotting, blotting out, blow upon, blur, brand, broad arrow, brush, burn, cancel, cancellation, censure, champain, charcoal, chemisorb, chemosorb, conceal, cork, cover up, cross out, cure, dab, darken, daub, deface, defame, defect, defile, dehumidify, dehydrate, dele, delete, deletion, demolish, denigrate, desiccate, destroy, digest, dim, dinge, disapprove, discolor, disfigure, disfigurement, disparage, disparagement, dog, drain, drink, drink in, drink up, dry, dysphemize, ebonize, eclipse, efface, effacement, engross, erase, erasure, err, evaporate, expose, expose to infamy, expunction, expunge, exsiccate, eyesore, filter in, fire, flaw, fleck, flick, flyspeck, freckle, fright, gargoyle, gibbet, hag, hang in effigy, harridan, hide, imbibe, imputation, infiltrate, ink, insolate, kiln, look a fright, look a mess, look bad, look like hell, look something terrible, macula, maculate, maculation, macule, mar, mark, mark of Cain, melanize, mess, monster, monstrosity, mummify, murk, nigrify, no beauty, obliterate, obliteration, obscure, odium, offend, offend the eye, onus, osmose, oversmoke, parch, patch, percolate in, pillory, pillorying, point champain, raze, reflection, reprimand, reproach, rub, rub out, rule out, scar, scarecrow, scorch, scratch, scratch out, scrubbing, sear, seep in, shade, shadow, shrivel, sight, sin, slur, slurp up, smear, smirch, smoke, smouch,

Etymology
Originally "blemish," perhaps from blettr:, or from  bloche: