Equanimity

Feeling of peace, tranquility, stability, evenness of mind, impartiality in the face of objects or events, gains or losses, honor or dishonor, praise or blame, pleasure or sorrow.

Equanimity is the fourth of the four immeasurable states or sublime mental states, together with benevolence, compassion and empathetic joy, which radiate in immeasurable infinite quantity when one attains paññā wisdom.

P & S: upekkhā, V: xả