It is the desire to treat others abusively without having kind feelings towards living beings.What is malice? It belongs to the emotion anger, lacks loving kindness, pity, and affection, and has the function of treating others abusively.-Abhidharmasamuccaya
Here the various synomyms beginning with lack of loving kindness are explained according to the commentaries which say that 'lack of loving kindness' is one'sown inclintation to treat others abusively. 'Lack of pity' is the inclination to induce others to treat others abusively. 'Lack of affection' is to be pleased when one hears or sees others acting in such a way.
Its function is easily understood.