term:

Corroborate

corroborate vt

-rat·ed
-rat·ing
[Latin corroboratus, past participle of corroborare to strengthen, from com-, prefix marking completion + robur strength, literally, oak tree]
: to support with evidence or authority
: strengthen or make more certain
cor·rob·o·ra·tion [kə-rÄ -bə-rā-shən]
n

cor·rob·o·ra·tive [kə-rÄ -bə-rā-tiv, -rə-tiv]
adj

Source: Merriam-Webster's Dictionary of Law ©1996. Merriam-Webster, Incorporated. Published under license with Merriam-Webster, Incorporated.