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-2 in the Appendix of Indo-European roots.]
in·veter·a·cy (-ər-ə-sē), in·veter·ate·ness n.
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2020 by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Indo-European & Semitic Roots Appendices
Thousands of entries in the dictionary include etymologies that trace their origins back to reconstructed proto-languages. You can obtain more information about these forms in our online appendices:
The Indo-European appendix covers nearly half of the Indo-European roots that have left their mark on English words. A more complete treatment of Indo-European roots and the English words derived from them is available in our Dictionary of Indo-European Roots.