Corroborate (verb)

1. Confirm or give support to (a statement, theory, or finding).
2. Strengthen or support (an argument or case).

Origin:

Late 16th century: from latin corroborat- "strengthened", from the verb corroborare, from cor- "together" + robur "strength".

Examples:

1. The new evidence corroborated the witness's statement.
2. The results of the study corroborate the theory.
3. The findings of the investigation were corroborated by other sources.
4. The testimony of the second witness corroborates the first.
5. The evidence corroborates the claim of the accused.