corroborate
to support or confirm with evidence
Roots
- com-: with, together, complete, or intensified
- rob / robor: strength, firmness, or oak-hard force
Other words with the rob / robor root
- robust: strong and healthy; sturdy
Corroborate means strengthen a claim with another piece of evidence.
The second witness corroborated the timeline without copying the first account.
Robust keeps the strength root familiar. Corroborate adds together-force: one fact grows stronger when another fact supports it.