INVET'ERACY, noun [Latin inveteratio. See Inveterate.] Long continuance, or the firmness or deep rooted obstinacy of any quality or state acquired by time; as the inveteracy of custom and habit; usually or always applied in a bad sense; as the inveteracy of prejudice, of error, or of any evil habit.
Source: Webster's 1828 American Dictionary ↗ · public-domain · returned verbatim, no AI