Main Entry: equa·nim·i·ty

Pronunciation: \ˌē-kwə-ˈni-mə-tē, ˌe-kwə-\

Function: noun

Inflected Form(s): plural equa·nim·i·ties

Etymology: Latin aequanimitas, from aequo animo with even mind

Date: circa 1616

1 : evenness of mind especially under stress <nothing could disturb his equanimity>
2 : right disposition : balance <physical equanimity>

synonyms equanimity, composure, sangfroid mean evenness of mind under stress. equanimity suggests a habit of mind that is only rarely disturbed under great strain <accepted her troubles with equanimity>. composure implies the controlling of emotional or mental agitation by an effort of will or as a matter of habit <maintaining his composure even under hostile questioning>. sangfroid implies great coolness and steadiness under strain <handled the situation with professional sangfroid>.