equanimity
n. US //ˌikwəˈnɪmɪti// UK //ˌiːkwɐnˈɪmɪti// equa·nim·i·ty
From French équanimité, from Latin aequanimitās (“calmness, equanimity”), from aequus (“even; calm; fair”) + animus (“mind, soul”) + -itās. By surface analysis, equ- + anim(us) + -ity.