#1 corroborate v. [confirm, sustain, substantiate, support, affirm] establish or strengthen as with new evidence or facts; "his story confirmed my doubts"; "The evidence supports the defendant". wn
#2 corroborate v. [validate] give evidence for. wn
#3 corroborate v. [underpin, bear out, support] support with evidence or authority or make more certain or confirm; "The stories and claims were born out by the evidence". wn
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