BLOTCH

[blotch] vt (1604): to mark or mar with blotches

[2]blotch n [perh. blend of [1]blot and [3]botch] (1669) 1: imperfection, blemish

2: a spot or mark (as of color or ink) esp. when large or irregular -- blotch.i.ly adv -- blotchy adj