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third-person singular simple present corroborates, present participle corroborating, simple past and past participle corroborated
(transitive) To confirm or support something with additional evidence; to attest or vouch for. quotations examples
The concurrence of all […] corroborates the same truth.
1832, [Isaac Taylor], Saturday Evening. […], London: Holdsworth and Ball
(transitive) To make strong; to strengthen. quotations examples
As any limb well and duly exercised, grows stronger, the nerves of the body are corroborated thereby.
1741, I[saac] Watts, The Improvement of the Mind: Or, A Supplement to the Art of Logick: […], London: […] James Brackstone, […]