1. (v. t.) To alter the natural hue or color of; to stain; to tinge; as, a drop of wine will discolor water; silver is discolored by sea water\.

2. (v. t.) To alter the true complexion or appearance of; to put a false hue upon.

achromatize attaint bedaub besmear besmirch besmoke bestain blacken blanch blaze blaze a trail bleach blemish blot blotch blur brand chalk chalk up check check off cicatrize dapple dappled darken dash daub decolor decolorize defile define delimit demarcate dim dirty dot drain drain of color dull engrave etiolate fade fleck freckle fume gash hatch impress imprint line make a mark mark mark off mark out motley mottle multicolor multicolored multihued nick notch pale parti-colored pencil pepper peroxide point prick print punch punctuate puncture riddle scar scarify scorch score scotch scratch seal seam sear singe slubber slur smear smirch smoke smut soil speck speckle splotch spot stain stamp stigmatize streak striate stripe sully taint tar tarnish tattoo tick tick off tone down trace underline underscore varicolored versicolor versicolored wash out whiten