the world > physical sensation > cleanness and dirtiness > dirtiness > dirt > soiled condition > soil [verb (transitive)] > stain > stain with specific substances (3)
transitive. To mark, stain, or smear with or as with ink.
transitive. To stain as with menstrual blood. Obsolete. rare.
transitive. To stain with iron mould (iron mould, n. 1b). Also in figurative context. Now rare.