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equanimity

ee-kwuh-NIM-uh-tee /ˌiːkwəˈnɪmɪti/

nounC1GRESATCAT

formalliterary

Mental calmness, composure, and evenness of temper, especially in difficult or trying situations.

Implies an active, conscious balance of mind rather than passive numbness or apathy.

The story behind the word. Coined in the early 17th century from Latin 'aequanimitas', which married 'aequus' (equal, level) with 'animus' (mind or soul). To the Romans, an 'equal mind' was one that neither soared into wild delusion during triumph nor collapsed into panic during disaster.

Word relationships

composure: Composure emphasizes outward self-control, whereas equanimity highlights inward emotional equilibrium.
serenity: Serenity implies a peaceful, unruffled state, whereas equanimity suggests mental balance maintained specifically under pressure.

agitation: Agitation is a state of severe restlessness and anxiety, the direct opposite of steady composure.
perturbation: Perturbation refers to mental disturbance or disquietude.

Commonly confused with

equality: Equality means having the same status or rights; equanimity means having an even, composed mind.

Word family

equanimous (adjective): Calm and composed under stress.
equanimously (adverb): In a calm and composed manner.

Collocations

maintain equanimity
face adversity with equanimity
remarkable equanimity
restore equanimity

Idioms & expressions

keep an even keel
cool head

Example sentences

"He accepted prosperity and disaster with equal equanimity." Philosophical literature on practical wisdom
"The CEO managed the emergency broadcast with remarkable equanimity, reassuring nervous investors." Corporate crisis response

Memory hook

Think 'EQUAL ANIMUS'—keeping your spirit on an equal level regardless of emotional ups and downs. Equal mind in unequal times.

When not to use

Do not use to describe mere physical balance or balance sheets in finance; it refers strictly to emotional and mental steady-state.

Fun facts

Sir William Osler, the founder of modern medical residency programs, gave a famous 1889 valedictory address titled 'Aequanimitas', arguing it was the single most vital quality for a physician.