CORROBORATE

[cor.rob.o.rate] vt -rat.ed ; -rat.ing [L corroboratus, pp. of corroborare, fr. com- + robor-, robur strength] (1530): to support with evidence or authority: make more certain syn see confirm -- cor.rob.o.ra.tion n -- cor.rob.o.ra.tive adj -- cor.rob.o.ra.tor n -- cor.rob.o.ra.to.ry adj