“Equanimity” means “calmness, especially during stressful situations”. It’s a characteristic of someone who maintains his or her composure. It’s often used to refer to a person’s way of speaking as well as their attitude – for example, “Although his tone was very aggressive, she answered him with equanimity”. Equanimity also refers to stability or steadiness, in a mental or emotional sense.

Example: “His exercises in meditation and prayer helped him view the chaos in his life with perfect equanimity”