Upanāha (Sanskrit; Tibetan phonetic: khön du dzinpa) is a Buddhist term translated as "resentment" or "enmity". It is defined as clinging to an intention to cause harm, and withholding forgiveness.^[1][2] It is one of the twenty subsidiary unwholesome mental factors within the Mahayana Abhidharma teachings.

The Abhidharma-samuccaya states:

What is resentment? It is not letting go of an obsession which develops through association with the anger which underlies it. Its function is to be the basis of non-endurance.^[1]

Alan Wallace described upanāha as "a lingering holding of anger (Sanskrit: krodha)".^[3]

• Mental factors (Buddhism)

• Ranjung Yeshe wiki entry for 'khon_du_'dzin_pa