Translation

裏付ける / 確証する / 証拠で補強する

Meaning

Corroborate means to support or confirm a statement, theory, testimony, or claim with additional evidence. It is common in legal, journalistic, and academic writing. The learner trap is confusing it with collaborate, which means work together.

Examples

• 防犯カメラの映像が目撃者の証言を裏付けました。
  The security footage corroborated the witness's testimony.
• その主張を裏付ける独立した証拠はありませんでした。
  There was no independent evidence to corroborate the claim.