A smudge, stain or soiling, or the act of soiling. May you be free of it in all its guises.
‘… free from taint, dependence, soilure of humanity or care for one’s kind; something rash, ridiculous, like my hyacinth, husband I mean, Bonthrop…’
Source: Virginia Woolf, Orlando, ed. Rachel Bowlby, Oxford: World’s Classics, 1992, p. 274