equanimity
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/icons/point.icon EQUANIMITY, COMPOSURE, SANGFROID mean evenness of mind under stress.
EQUANIMITY suggests a habit of mind that is only rarely disturbed under great strain.
e.g. 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.
e.g. maintaining his composure even under hostile questioning
SANGFROID implies great coolness and steadiness under strain.
e.g. handled the situation with professional sangfroid
noun
mental calmness, composure, and evenness of temper, especially in a difficult situation:
｟かたく｠ (心･気性の)平静, 落ち着き, 冷静
e.g. she accepted both the good and the bad with equanimity.
ORIGIN
early 17th century (also in the sense ‘fairness, impartiality’): from Latin aequanimitas, from aequus ‘equal’ + animus ‘mind’.