Equanimity is defined as being calm and maintaining your emotions, especially in bad situations.
(noun)An example of equanmity is when you react calmly when you are given bad news about your health or your job.
See equanimity in Webster's New World College Dictionary
noun
Origin: L aequanimitas < aequanimis < aequus, even, plain + animus, the mind: see animal
See equanimity in American Heritage Dictionary 4
noun
Origin:
Origin: Latin aequanimitās
Origin: , from aequanimus, even-tempered, impartial
Origin: : aequus, even
Origin: + animus, mind; see anə- in Indo-European roots
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