Definition of "inveteracy" [in•vet•er•a•cy]

• The state of being inveterate; long continuance; firmness or deep-rooted persistence. (noun)

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• "The inveteracy of this custom may be inferred from the following incident: —"
• "I observed that, like other Jacobites, in his inveteracy against the memory of King William, he had adopted the party opinion, that the monarch, on the day he had his fatal accident, rode upon a horse once the property of the unfortunate Sir John Friend, executed for high treason in 1698."
• "The pipers on both sides blew their charge, and the combatants again mingled in battle, not indeed with the same strength, but with unabated inveteracy."