blot

(noun) a blemish made by dirt. Synonyms: smudge, spot, daub, smear, smirch, slur. Example: "He had a smudge on his cheek."

(noun) an act that brings discredit to the person who does it. Synonyms: smear, smirch, spot, stain. Example: "He made a huge blot on his copybook."

(verb) dry (ink) with blotting paper.

(verb) make a spot or mark onto. Synonyms: spot, fleck, blob. Example: "The wine spotted the tablecloth."