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Fortitude vs Undefined - What's the difference?

fortitude | undefined |

As a noun fortitude

is mental or emotional strength that enables courage in the face of adversity.

As an adjective undefined is

lacking a definition or value.

fortitude

English

Noun

(en noun)
  • Mental or emotional strength that enables courage in the face of adversity.
  • * 1612 , , King Henry VIII , act 3, sc. 2:
    • . . . I am able now, methinks,
    Out of a fortitude of soul I feel,
    To endure more miseries.
  • * , ch. 1:
    • I shall soon have need for all my fortitude , as I am on the point of separation from my own daughter.
  • * 1906 , , The Mirror of the Sea , ch. 21:
    • She may be saved by your efforts, by your resource and fortitude bearing up against the heavy weight of guilt and failure.
  • * 2012 Jan. 30, , " The Strategist," Time :
    • Mitt Romney . . . charges that Obama is an appeaser who apologizes for America, lacks fortitude and is "tentative, indecisive, timid and nuanced."
  • (archaic) Physical strength.
  • * 1604 , , Othello , act 1, sc. 3:
    • DUKE OF VENICE: The Turk with a most mighty preparation makes for
    Cyprus. Othello, the fortitude of the place is best
    known to you.

    Synonyms

    * (mental or emotional strength) inner strength, moxie, resolve

    undefined

    English

    Adjective

    (wikipedia undefined) (-)
  • Lacking a definition or value.
  • (mathematics, computing) That does not have a meaning and is thus not assigned an interpretation.
    • The result of division by zero is undefined .

    Antonyms

    * defined