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corroborate

[verb kuh-rob-uh-reyt; adjective kuh-rob-er-it]
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verb (used with object), cor·rob·o·rat·ed, cor·rob·o·rat·ing.
  1. to make more certain; confirm: He corroborated my account of the accident.
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adjective
  1. Archaic. confirmed.
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Origin of corroborate

1520–30; < Latin corrōborātus past participle of corrōborāre to strengthen, equivalent to cor- cor- + rōbor(āre) to make strong (derivative of rōbor, rōbur oak (hence, strength); see robust) + -ātus -ate1
Related formscor·rob·o·ra·tive [kuh-rob-uh-rey-tiv, -er-uh-tiv] /kəˈrɒb əˌreɪ tɪv, -ər ə tɪv/, cor·rob·o·ra·to·ry, adjectivecor·rob·o·ra·tive·ly, cor·rob·o·ra·to·ri·ly, adverbcor·rob·o·ra·tor, nounnon·cor·rob·o·rat·ing, adjectivenon·cor·rob·o·ra·tive, adjectivenon·cor·rob·o·ra·tive·ly, adverbnon·cor·rob·o·ra·to·ry, adjectiveun·cor·rob·o·rat·ed, adjectiveun·cor·rob·o·ra·tive, adjectiveun·cor·rob·o·ra·tive·ly, adverbun·cor·rob·o·ra·to·ry, adjective
Can be confusedcollaborate corroborate

Synonyms

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1. verify, authenticate, support, validate.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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British Dictionary definitions for corroborate

corroborate

verb (kəˈrɒbəˌreɪt)
  1. (tr) to confirm or support (facts, opinions, etc), esp by providing fresh evidencethe witness corroborated the accused's statement
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adjective (kəˈrɒbərɪt) archaic
  1. serving to corroborate a fact, an opinion, etc
  2. (of a fact) corroborated
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Derived Formscorroboration, nouncorroborative (kəˈrɒbərətɪv) or corroboratory, adjectivecorroboratively, adverbcorroborator, noun

Word Origin

C16: from Latin corrōborāre to invigorate, from rōborāre to make strong, from rōbur strength, literally: oak
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for corroborate

v.

1530s, "to give (legal) confirmation to," from Latin corroboratus, past participle of corroborare "to strengthen, invigorate," from com- "together" or "thoroughly" (see com-) + roborare "to make strong," from robur, robus "strength," (see robust).

Meaning "to strengthen by evidence, to confirm" is from 1706. Sometimes in early use the word also has its literal Latin sense, especially of medicines. Related: Corroborated; corroborating; corroborative.

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Online Etymology Dictionary, © 2010 Douglas Harper