What is to warrant; to maintain by affirmations; to attest; to affirm; to avouch. They made him ashamed to vouch the truth of the relation, and afterwards to credit it. Atterbury called?

vouch — To warrant; to maintain by affirmations; to attest; to affirm; to avouch. They made him ashamed to vouch the truth of the relation, and afterwards to credit it. Atterbury. (Webster's 1913.)

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