The Collaborative International Dictionary of English v.0.48:

Moil \Moil\, v. t. [imp. & p. p. Moiled; p. pr. & vb. n.
   Moiling.] [OE. moillen to wet, OF. moillier, muillier, F.
   mouller, fr. (assumed) LL. molliare, fr. L. mollis soft. See
   Mollify.]
   To daub; to make dirty; to soil; to defile.
   [1913 Webster]

         Thou . . . doest thy mind in dirty pleasures moil.
                                                  --Spenser.
   [1913 Webster]