Source : Webster's Revised Unabridged Dictionary (1913)

Spiteful \Spite"ful\, a.
   Filled with, or showing, spite; having a desire to vex,
   annoy, or injure; malignant; malicious; as, a spiteful person
   or act. --Shak. -- {Spite"ful*ly}, adv. {Spite"ful*ness}, n.

Source : WordNet®

spitefully
     adv 1: in a maliciously spiteful manner; "pray for them that
            despitefully use us" [syn: {despitefully}]
     2: in a spiteful manner; "he answered his accusers spitefully"
        [syn: {with spite}]