One of the most sensible and practical of all proverbs, as every body's experience can avouch.
But it is not so, as every well-constituted mind will avouch.
This Zeno will avouch for me, and Crato too, who confine sick persons to a fish diet, as of all others the lightest sort of meat.
Who would not avouch the honesty of John L. Stephens after reading his travels?
I am well trained in navigation, as Sir Richard Grenville can avouch.
"There can be no better rede, and we will all avouch it," said the citizens.
While we proclaim him to be such an one, we avouch nothing but what we are ready to establish by solid proof.
"Before God and man, I will avouch the deed," answered Endicott.
You will think you have made no offence, if the Duke avouch the justice of your dealing?
Love is not blind in this case, Alice dear, I avouch it; but it has the gift of prevision also.
late 15c., from Middle French avochier "call upon as authority," in Old French "call (to court), advocate, plead (a case)," from Latin advocare "call to" as a witness (see advocate).
Avouch, which is no longer in common use, means guarantee, solemnly aver, prove by assertion, maintain the truth or existence of, vouch for .... Avow means own publicly to, make no secret of, not shrink from admitting, acknowledge one's responsibility for .... Vouch is now common only in the phrase vouch for, which has taken the place of avouch in ordinary use, & means pledge one's word for .... [Fowler]Related: Avouched; avouching.