01 a. Old; long-established.
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1.
Old; long-established.[Obs.]“It is an inveterate and received opinion.” — Bacon.
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2.
Firmly established by long continuance; obstinate; deep-rooted; of long standing; as, an inveterate disease; an inveterate abuse.“Heal the inveterate canker of one wound.” — Shak.
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3.
Having habits fixed by long continuance; confirmed; habitual; as, an inveterate idler or smoker.
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4.
Malignant; virulent; spiteful.