Sentence:  And ſince not only a dead Fathers fame, / But more a Ladies honour muſt be touch'd, / Which nice as Ermines will not bear a <WSD>Soil</WSD> ; / Let all retire ; that you alone may hear / What ev'n in whiſpers I won'd tell your ear. 
Meaning of the word marked with <WSD> tags:  That which soils or pollutes; a stain.