藏怒宿怨

Explanation: Hidden, places: retention. Hidden anger and resentment to stay in the heart. Refers to the embittered, Nan Xiao long time. 　　Usage: Joint type; as subject, predicate; that harbor anger and resentment 　　Source: Zou Meng Ke Warring States "Mencius million chapter on": "Habitat for Humanity is to the younger brother also does not harbor anger Yan, Yan no feud." 　　Examples: Be open-minded, ~ no good to myself.