Vouch

v. t. [imp. & p. p. VOUCHED (vouch't); p. pr. & vb. n. VOUCHING.] [Norm. Fr. voucher, O. Fr. vouchier, voucher, to call, to vouch, from Lat. vocare, to call, from vox, vocis, a voice, cry. Cf. Avouch.]

1. To call upon to witness; to obtest. “Vouch the silent stars and conscious moon.” Dryden.
2. To call; to summon. [Obs. and rare.]
3. To warrant; to maintain by affirmations; to attest; to affirm.

They made him ashamed to vouch the truth of the relation, and afterward to credit it. Atterbury. 4. To back; to support; to confirm; to establish. Me dark horrors chilled At such bold words vouched with deeds so bold. Milton. 5. (Law.) To call into court to warrant and defend, or to make good a warranty of title. He vouches the tenant in tail, who vouches over the common vouchee. Blackstone. Syn.—To obtest; declare; affirm; attest; warrant; confirm; asseverate; aver; protest; assure.