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[uh-vouch] /əˈvaʊtʃ/
verb (used with object)
to make frank acknowledgment or affirmation of; declare or assert with positiveness.
to assume responsibility for; vouch for; guarantee.
to admit; confess.
Origin of avouch
1350-1400; Middle English avouchen < Middle French avouchier < Latin advocāre. See a-5, vouch, advocate
Related forms
avoucher, noun
avouchment, noun
unavouched, adjective Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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British Dictionary definitions for avouch


verb (transitive) (archaic)
to vouch for; guarantee
to acknowledge
to assert
Derived Forms
avouchment, noun
Word Origin
C16: from Old French avochier to summon, call on, from Latin advocāre; see advocate
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for avouch

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.

Online Etymology Dictionary, © 2010 Douglas Harper
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