• WordNet 3.6
    • v avouch admit openly and bluntly; make no bones about
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Webster's Revised Unabridged Dictionary
    • n Avouch Evidence; declaration. "The sensible and true avouch Of mine own eyes."
    • Avouch To acknowledge deliberately; to admit; to confess; to sanction. "Thou hast avouched the Lord this day to be thy God."
    • Avouch To appeal to; to cite or claim as authority. "They avouch many successions of authorities."
    • Avouch To declare or assert positively and as matter of fact; to affirm openly. "If this which he avouches does appear.""Such antiquities could have been avouched for the Irish."
    • Avouch To maintain a just or true; to vouch for. "We might be disposed to question its authenticity, it if were not avouched by the full evidence."
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Century Dictionary and Cyclopedia
    • avouch To affirm or acknowledge openly; declare or assert with positiveness; proclaim.
    • avouch To admit, confess, or avow.
    • avouch To maintain, vindicate, or justify; make good; answer for; establish; guarantee; substantiate.
    • avouch To appeal to, or cite as proof or warrant: as, to avouch the authorities on any subject.
    • avouch To give assurance or guaranty; vouch: as, “I can avouch for her reputation,”
    • n avouch Evidence; testimony; assurance.
    • ***
Chambers's Twentieth Century Dictionary
    • v.t Avouch a-vowch′ to avow: to assert or own positively: to maintain: guarantee; to appeal to. v.i. to give assurance of
    • n Avouch (Shak.) evidence
    • ***


  • Michel Eyquem De Montaigne
    “The worst of my actions or conditions seem not so ugly unto me as I find it both ugly and base not to dare to avouch for them.”


Webster's Revised Unabridged Dictionary
OF. avochier, LL. advocare, to recognize the existence of a thing, to advocate, fr. L. advocare, to call to; ad, + vocare, to call. Cf. Avow to declare, Advocate, and see Vouch (v. t.)


In literature:

As a matter most imperatively of course, not a farthing more should be forthcoming, and many oaths avouched that stern determination.
"The Complete Prose Works of Martin Farquhar Tupper" by Martin Farquhar Tupper
The Bedaween have eyes like eagles; and some avouched that they could see the Mount of Olives, and the minaret upon its summit.
"Byeways in Palestine" by James Finn
God knoweth that I was never causer of her death by my will, as her brother Sir Lavaine here will avouch for me.
"King Arthur's Knights" by Henry Gilbert
But it is not so, as every well-constituted mind will avouch.
"Impressions of America" by Tyrone Power
If he avouches not my honour.
"The Works of Lord Byron" by Lord Byron
He avouched it to me himself.
"Rookwood" by William Harrison Ainsworth
They avouch Him to be their God; He avouches them to be His people.
"The Ordinance of Covenanting" by John Cunningham
It is an insufficient guarantee for that which it avouches.
"Blackwood's Edinburgh Magazine, Volume 62, No. 382, October 1847" by Various
It is a pity that an account like this, avouched by six witnesses, was not thoroughly sifted.
"The Romance of Natural History, Second Series" by Philip Henry Gosse
On his head, and on mine, I avouch it.
"Blackwood's Edinburgh Magazine, Volume 62, No. 383, September 1847" by Various
Besides, thou hast escaped, art here to avouch it thyself.
"William Shakespeare as he lived." by Henry Curling
She only waited patiently for answers to questions she furnished, having the most complete faith and belief in the facts Alice avouched.
"Professor Huskins" by Lettie M. Cummings
Love is not blind in this case, Alice dear, I avouch it; but it has the gift of prevision also.
"The Last of the Vikings" by John Bowling
The story of "Jocelyn" is avouched by the author to be almost a series of actual occurrences.
"French Classics" by William Cleaver Wilkinson
The loitering rider could even avouch that the uncle had previously taken the same.
"Titan: A Romance" by Jean Paul
How do we know that the avouching unknown could not have been sold a gold brick?
"The Best Psychic Stories" by Various
What he recounts, my Lord, you have his own avouch for.
"Rob of the Bowl, Vol. I (of 2)" by John P. Kennedy
Stay, is it because you were my husband once, as these lines avouch?
"The Cloister and the Hearth" by Charles Reade
Not a statement within its pages was committed to paper until it was thoroughly and reliably avouched for.
"The Story of the Great Fire in St. John, N.B., June 20th, 1877" by George Stewart
Against an established creed thus avouched, it was dangerous to raise any doubts.
"Plato and the Other Companions of Sokrates, 3rd ed. Volume IV (of 4)" by George Grote

In poetry:

There we shall see how he was touch'd
With all our grief and pain
(As in his word he hath avouch'd),
When we with him shall reign;
"Of Heaven" by John Bunyan

In science:

And it is no good avouching that the off-shell dependence of the propagator on the momentum looks ‘reasonable’, with ‘suitable behaviour’ in the infrared or ultraviolet limits, since one can change the behaviour at will, just by choosing the gauge function M however one likes.
A critique of the gauge technique