soil 2 
(soil)
(soil)v. soiled, soil·ing, soils
v.tr.
1. To make dirty, particularly on the surface.
2. To disgrace; tarnish: a reputation soiled by scandal.
3. To corrupt; defile.
4. To dirty with excrement.
v.intr.
To become dirty, stained, or tarnished.
n.
1.
a. The state of being soiled.
b. A stain.
2. Filth, sewage, or refuse.
3. Manure, especially human excrement, used as fertilizer.
[Middle English soilen, from Old French souiller, from Vulgar Latin *suculāre (from Late Latin suculus, diminutive of Latin sūs, pig; see sū- in the Appendix of Indo-European roots) or from souil, wallow of a wild boar (from Latin solium, seat, bathtub; see SOIL1).]