to discolor or soil; spot or smudge with or as with soot, dust, dirt, etc.

to sully or tarnish (a person, reputation, character, etc.); disgrace; discredit.

a dirty mark or smear, as of soot, dust, dirt, etc.

a stain or blot, as on reputation.

verb

bedaub , besmear , dab , daub , plaster , smudge , besmirch , bespatter , blacken , blemish , blot , blotch , contaminate , corrupt , country , degrade , dirty , discredit , disgrace , dishonor , pollute , smear , soil , stain , sully , taint , tarnish

noun

blot , blotch , daub , smudge , smutch , splotch , stain