smudge

noun

1. a stain, blur, or smear; dirty spot
2. 1. a fire made to produce dense smoke
   2. such smoke produced by burning a material in containers (), esp. for driving away insects or protecting plants from frost

Origin: Early ModE, prob. < the v.

transitive verb smudged, smudging

1. to protect (an orchard, etc.) with smudge
2. to make dirty; soil; smutch

Origin: ME smogen, akin to Du smotsen, to besmirch: for IE base see smut

intransitive verb

1. to blur or smear
2. to become smudged