Significance of Vyapada
Vyapada is interpreted differently in Mahayana and Theravada Buddhism. In Mahayana, it denotes maliciousness or harmful intentions that a bodhisattva must steer clear of in their thoughts and actions. Conversely, Theravada views Vyapada as a mental state characterized by ill-will or hatred, which hampers the cultivation of compassion and lovingkindness. Both perspectives emphasize the importance of overcoming harmful mental states to foster positive qualities in one's spiritual development.
The below excerpts are indicatory and do represent direct quotations or translations. It is your responsibility to fact check each reference.
Buddhist concept of 'Vyapada'
Vyapada in Buddhism signifies maliciousness and harmful intentions that the bodhisattva should shun. It represents a mental state of ill-will or hatred that hinders the cultivation of compassion and lovingkindness.
From: Maha Prajnaparamita Sastra
(1) Maliciousness or harmful intentions, which the bodhisattva must avoid in his thoughts and actions.[1]
From: Abhidhamma in Daily Life
(1) The mental state of ill-will or hatred that obstructs the development of compassion and lovingkindness.[2]