blotch
noun /blɒtʃ/
  /blɑːtʃ/
 - a mark, usually not regular in shape, on skin, plants, material, etc.(皮肤、植物、物体等上面不规则的)斑点,污点 - He had come out in (= become covered in) dark red blotches.他身上长出了一块块深红色的斑。 
 词源early 17th cent. (as a verb): partly an alteration of obsolete plotch in the same sense (of unknown origin), influenced by blot; partly a blend of blot and botch.
- He had come out in (= become covered in) dark red blotches.