verb

avouch

uh-VOWCH/əˈvaʊtʃ/

Declare confidently that something is true.

The craftsperson avouches that the repaired chair is sturdy enough to use.

A craftsperson firmly vouches for a repaired chair’s soundness to a cautious customer, one hand on chest and other hand demonstrating the sturdy joined leg, direct assured eye contact.

Etymology

To “call to” meant summoning a witness or invoking an authority. That appeal to testimony underlies avouch’s sense of affirming a claim or guaranteeing its truth.

More examples

I can avouch the truth of her account.
He avouched his loyalty before the assembled council.
The letter avouches the writer's confidence in the findings.

Forms

avouch · avouches · avouched · avouching

Similar words

affirm: Is a more common term for stating something positively.
vouch: Usually occurs with for when guaranteeing reliability or character.