S: (v) stain (color with a liquid dye or tint) "Stain this table a beautiful walnut color"; "people knew how to stain glass a beautiful blue in the middle ages"
S: (v) stain (produce or leave stains) "Red wine stains the table cloth"
S: (v) tarnish, stain, maculate, sully, defile (make dirty or spotty, as by exposure to air; also used metaphorically) "The silver was tarnished by the long exposure to the air"; "Her reputation was sullied after the affair with a married man"
S: (v) stain (color for microscopic study) "The laboratory worker dyed the specimen"