fortitude

noun for·ti·tude \ˈfȯr-tə-ˌtüd, –ˌtyüd\

: mental strength and courage that allows someone to face danger, pain, etc.

Full Definition of FORTITUDE

: strength of mind that enables a person to encounter danger or bear pain or adversity with courage

obsolete : strength

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She has endured disappointments with fortitude and patience.
<it was only with the greatest fortitude that the Pilgrims were able to survive their first winter in Plymouth>
… everyone in the family was succored by Elizabeth’s fortitude and steadfastness. —Nicholas Fox Weber, The Clarks Of Cooperstown, 2007
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Middle English, from Latin fortitudin-, fortitudo, from fortis

First Known Use: 12th century