v. at·test·ed, at·test·ing, at·tests
1. To affirm to be correct, true, or genuine: The date of the painting was attested by the appraiser.
a. To certify by signature or oath: attest a will.
b. To certify in an official capacity.
a. To supply or be evidence of: Her fine work attests her ability. See Synonyms at indicate.
b. Linguistics To confirm the existence, usage, or currency of (a word, for example), as by being recorded in writing.
4. To put under oath.
To bear witness; give testimony: attested to their good faith.
[Latin attestārī : ad-, ad- + testārī, to be witness (from testis, witness; see trei- in the Appendix of Indo-European roots).]
at′tes·tation (ăt′ĕs-tāshən, ăt′ə-stā-) n.
at·tester, at·testor n.
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2022 by HarperCollins Publishers. 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.