Emily Dickinson Lexicon

vouch (vouches), v. [AFr and OFr vocher, voucher, to call, summon, invoke , claim; < L. vocāre, to call.] (webplay: bear, God, love, make, old, permit, solemn, stand, taking).

1. Swear; attest; testify; warrant; witness; guarantee; say for sure; declare for certain.
2. Proclaim; assert; announce.