cor·rob·o·ra·tive I. \kəˈräbəˌrād.]iv, -āt], -b(ə)rəd.], -b(ə)rət], ]ēv also ]əv\adjective Etymology: Middle French corroboratif, from corroborer to strengthen (from Latin corroborare) + -atif -ative : serving or tending to corroborate : confirmatory < corroborative details > • cor·rob·o·ra·tive·ly\]ə̇vlē, -li\adverb II. noun (-s) archaic: corroborant