(v)staincolor 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”
(v)tarnish, stain, maculate, sully, defilemake 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”