tr.v. cor·rob·o·rat·ed, cor·rob·o·rat·ing, cor·rob·o·rates
To strengthen or support with other evidence; make more certain. See Synonyms at confirm.
[Latin corrōborāre, corrōborāt- : com-, com- + rōborāre, to strengthen (from rōbur, rōbor-, strength; see reudh- in the Appendix of Indo-European roots).]
cor·robo·ra′tive (-ə-rā′tĭv, -ər-ə-tĭv), cor·robo·ra·to′ry (-ər-ə-tôr′ē) adj.
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2019 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.