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1. Firmly and long established; deep-rooted: inveterate preferences.
2. Persisting in an ingrained habit; habitual: an inveterate liar. See Synonyms at chronic.

[Middle English, from Latin inveterātus, past participle of inveterārī, to grow old, endure : in-, causative pref.; see in-2 + vetus, veter-, old; see wet- in Indo-European roots.]

in·vet′er·a·cy (-ər-ə-sē), in·vet′er·ate·ness n.
in·vet′er·ate·ly adv.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
References in periodicals archive ?
She hits the bedrock of his nature that has just been dramatized for the audience, the level of inveterateness where who he is is given.
A mentality capable of thinking in subordinate clauses, of qualifying tentative hypotheses, is a different thing from that which rarely gets beyond simple statements, and which usually expresses itself in expostulations and sudden retractions, as we do with awkward inveterateness in speech.