From WordNet (r) 2.0 (August 2003) [wn]:
malevolent
adj 1: wishing or appearing to wish evil to others; arising from
intense ill will or hatred; "a gossipy malevolent old
woman"; "failure made him malevolent toward those who
were successful" [syn: malicious] [ant:
benevolent]
2: extremely malevolent or malicious; "the malignant tongues of
gossipers" [syn: malignant]
3: having or exerting a malignant influence; "malevolent
stars"; "a malefic force" [syn: malefic, malign,
evil]
From The Collaborative International Dictionary of English v.0.48 [gcide]:
Malevolent \Ma*lev"o*lent\, a. [L. malevolens, -entis; male ill
+ volens, p. pr. of velle to be willing or disposed, to wish.
See Malice, and Voluntary.]
Wishing evil; disposed to injure others; rejoicing in
another's misfortune.
[1913 Webster]
Syn: Ill-disposed; envious; mischievous; evil-minded;
spiteful; malicious; malignant; rancorous.
[1913 Webster]