Source : Webster's Revised Unabridged Dictionary (1913)

Forsake \For*sake"\, v. t. [imp. {Forsook}; p. p. {Forsaken}; p.
   pr. & vb. n. {Forsaking}.] [AS. forsacan to oppose, refuse;
   for- + sacan to contend, strive; akin to Goth. sakan. See
   {For-}, and {Sake}.]
   1. To quit or leave entirely; to desert; to abandon; to
      depart or withdraw from; to leave; as, false friends and
      flatterers forsake us in adversity.

            If his children forsake my law, and walk not in my
            judgments.                            --Ps. lxxxix.
                                                  30.

   2. To renounce; to reject; to refuse.

            If you forsake the offer of their love. --Shak.

   Syn: To abandon; quit; desert; fail; relinquish; give up;
        renounce; reject. See {Abandon}.

Source : WordNet®

forsake
     v : leave someone who needs or counts on you; leave in the
         lurch; "The mother deserted her children" [syn: {abandon},
          {desolate}, {desert}]
     [also: {forsook}, {forsaken}]