Definition of avouch :
1. Evidence; declaration.
2. To acknowledge deliberately; to admit; to confess; to sanction.
3. To appeal to; to cite or claim as authority.
4. To declare or assert positively and as matter of fact; to affirm openly.
5. To maintain a just or true; to vouch for.
affirm (part of speech: verb)
profess, propound, accept, ratify, pledge, validate, contend, certify, admit, declare, promise, corroborate, express, maintain, sustain, submit, endorse, assure, warrant, verify, claim, acknowledge, testify, adjure, approve, affirm, support, proclaim, state, aver, attest, pronounce, assert, set down
evince (part of speech: verb)
establish, witness, indicate, exemplify, prove, demonstrate, adduce, exhibit, depose, authenticate, illustrate, confirm, determine, betoken, observe, substantiate, vouch, connote, manifest, evince, document
- Rarely, but on some peculiarly important occasions, the Zveltau avouch their sincerity by an appeal to their own symbols; and it is affirmed that an oath attested by the Circle and the Star has never, in the lapse of ages, been broken or evaded. - "Across the Zodiac", Percy Greg.
- And if a question was made of his faithful dealing, he had his servants ready, that to his purpose he had brought up, that would avouch and swear to his book or word. - "The Works of John Bunyan Volume 3", John Bunyan.
- It was by faith in him, that all to succeed them should in this manner avouch the Lord. - "The Ordinance of Covenanting", John Cunningham.