e·qua·nim·i·ty
noun/ˌekwəˈnɪməti/
/ˌekwəˈnɪməti/
[uncountable] (formal)- a calm state of mind that means that you do not become angry or upset, especially in difficult situations
（尤指处于困境时的）镇静，沉着，冷静 - She accepted the prospect of her operation with equanimity.
她心情平静地接受了动手术的可能性。
Word Originearly 17th cent. (also in the sense ‘fairness, impartiality’): from Latin aequanimitas, from aequus ‘equal’ + animus ‘mind’. - She accepted the prospect of her operation with equanimity.