v. & n.
v.tr. 1 make dirty; smear or stain with dirt (soiled linen). 2 tarnish, defile; bring discredit to (would not soil my hands with it).
n. 1 a dirty mark; a stain, smear, or defilement. 2 filth; refuse matter. soil pipe the discharge-pipe of a lavatory.
[ ME f. OF suiller, soiller, etc., ult. f. L sucula dimin. of sus pig ]