corroborate > define

verb

• Establish or strengthen as with new evidence or facts.
  • usage: "his story confirmed my doubts"; "The evidence supports the defendant"
  • synonyms: confirm, sustain, substantiate, support, affirm
• Give evidence for.
  • synonyms: validate
• Support with evidence or authority or make more certain or confirm.
  • usage: "The stories and claims were born out by the evidence"
  • synonyms: underpin, bear out, support

• (v.t.) To make more certain; to confirm; to establish.
• (v.t.) To make strong or to give additional strength to; to strengthen.
• (a.) Corroborated.