• Webster's Revised Unabridged Dictionary
    • Inveteracy Firm establishment by long continuance; firmness or deep-rooted obstinacy of any quality or state acquired by time; as, the inveteracy of custom, habit, or disease; -- usually in a bad sense; as, the inveteracy of prejudice or of error. "An inveteracy of evil habits that will prompt him to contract more."
    • Inveteracy Malignity; spitefulness; virulency. "The rancor of pamphlets, the inveteracy of epigrams, and the mortification of lampoons."
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Century Dictionary and Cyclopedia
    • n inveteracy The state of being inveterate; long continuance; firmness or deep-rooted persistence.
    • ***
Chambers's Twentieth Century Dictionary
    • ns Inveteracy firmness produced by long use or continuance
    • ***


Webster's Revised Unabridged Dictionary
From Inveterate
Chambers's Twentieth Century Dictionary
L. inveterāre, -ātum, to grow old—in, in, vetus, veteris, old.


In literature:

Pursued with persistent inveteracy, I cut off my hair, I disguised myself as a woodman.
"Ten Years Later" by Alexandre Dumas, Pere
Such inveteracy (like Dr. Johnson's against Swift) was not unnaturally suspected by friends in England of having some personal motive.
"Travels Through France and Italy" by Tobias Smollett
Pursued with persistent inveteracy, I cut off my hair, I disguised myself as a woodman.
"The Vicomte de Bragelonne" by Alexandre Dumas, Pere
His ancient inveteracy against your country has made him a favourite with Bonaparte.
"Memoirs of the Court of St. Cloud, Complete" by Lewis Goldsmith
Upon the whole, Madam, said I, can you say, that the inveteracy lies not as much on our side, as on his?
"Clarissa, Volume 2 (of 9)" by Samuel Richardson
He had not calculated either the strength or inveteracy of his enemies, or the changeableness of that public opinion on which he relied.
"A Popular History of France From The Earliest Times Volume VI. of VI." by Francois Pierre Guillaume Guizot
Their inveteracy, however, was principally directed against the Roman commerce, and the Romans themselves.
"Robert Kerr's General History and Collection of Voyages and Travels, Volume 18" by William Stevenson
My blind inveteracy returned.
"The Piazza Tales" by Herman Melville
These fight with great inveteracy, and endeavour to seize each other by the tongue.
"The History of Sumatra" by William Marsden
Their constant tendency is to increase in virulence and inveteracy.
"Plain Facts for Old and Young" by John Harvey Kellogg