10 letters · 24 points in Scrabble
noun steadiness of mind under stress
originFrom French équanimité, from Latin aequanimitās (“calmness, equanimity”), from aequus (“even; calm; fair”) + animus (“mind, soul”) + -itās. By surface analysis, equ- + anim(us) + -ity.
Etymology from Wiktionary, CC BY-SA 3.0