Source : Webster's Revised Unabridged Dictionary (1913)

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.

         Thou . . . doest thy mind in dirty pleasures moil.
                                                  --Spenser.

Moil \Moil\, v. i. [From {Moil} to daub; prob. from the idea of
   struggling through the wet.]
   To soil one's self with severe labor; to work with painful
   effort; to labor; to toil; to drudge.

         Moil not too much under ground.          --Bacon.

         Now he must moil and drudge for one he loathes.
                                                  --Dryden.

Moil \Moil\, n.
   A spot; a defilement.

         The moil of death upon them.             --Mrs.
                                                  Browning.

Source : WordNet®

moil
     v 1: work hard; "She was digging away at her math homework";
          "Lexicographers drudge all day long" [syn: {labor}, {labour},
           {toil}, {fag}, {travail}, {grind}, {drudge}, {dig}]
     2: be agitated; "the sea was churning in the storm" [syn: {churn},
         {boil}, {roil}]
     3: moisten or soil; "Her tears moiled the letter"