Emily Dickinson Lexicon

COR-ROB'O-RATE, v.t. [L. corroboro; con and roboro, to strengthen, from robur, strength. Class Rb.]

1. To strengthen; to make strong, or to give additional strength to; as, to corroborate the nerves; corroborate the judgment, authority, or habits. – Watts. Wotton.
2. To confirm; to make more certain. The news was doubtful, but is corroborated by recent advices.