tr.v. a·verred, a·ver·ring, a·vers
1. To affirm positively; declare: "Liberal politicians ... found it necessary to aver that they were in favor of rigid economy in public spending too" (John Kenneth Galbraith).
2. Law To assert formally as a fact.
[Middle English averren, from Old French averer, from Vulgar Latin *advērāre : Latin ad-, ad- + Latin vērus, true; see wērə-o- in the Appendix of Indo-European roots.]
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2018 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.