Verb

(es)

To declare freely and openly; to assert.

* Shakespeare

if this which he avouches does appear

* Spenser

Such antiquities could have been avouched for the Irish.

To acknowledge deliberately; to admit; to confess; to sanction.

* Bible, Deuteronomy xxvi. 17

Thou hast avouched the Lord this day to be thy God.

To confirm or verify, to affirm the validity of.

* Milman

We might be disposed to question its authenticity, it if were not avouched by the full evidence.

To appeal to; to cite or claim as authority.

* Edward Coke

They avouch many successions of authorities.

Verb

(es)

To make stable or firm; to confirm.

*

To form; to found; to institute; to set up in business.

* , (w) 6:18

But with thee will I establish my covenant; and thou shalt come into the ark, thou, and thy sons, and thy wife, and thy sons' wives with thee.

To appoint or adopt, as officers, laws, regulations, guidelines, etc.; to enact; to ordain.

* {{quote-book, year=1922, author=(Ben Travers), title=(A Cuckoo in the Nest)

, chapter=4 citation , passage=By some paradoxical evolution rancour and intolerance have been established in the vanguard of primitive Christianity. Mrs. Spoker, in common with many of the stricter disciples of righteousness, was as inclement in demeanour as she was cadaverous in aspect.}}

To prove and cause to be accepted as true; to establish a fact; to demonstrate.