to discolor with spots or streaks of foreign matter.
to bring reproach or dishonor upon; blemish.
9.
to sully with guilt or infamy; corrupt.
10.
to color or dye (wood, cloth, etc.) by any of various processes that change or react with the substance chemically.
11.
to color with something that penetrates the substance.
12.
to treat (a microscopic specimen) with some reagent or dye in order to color the whole or parts and so give distinctness, contrast of tissues, etc.