vouch.
To call on (someone) to be a witness to something.
Meaning & usage
To call on (someone) to be a witness to something.
To cite or rely on (an authority, a written work, etc.) in support of one's actions or opinions.
To affirm or warrant the correctness or truth of (something); also, to affirm or warrant (the truth of an assertion or statement).
To bear witness or testify to the nature or qualities (of someone or something).
To back, confirm, or support (someone or something) with credible evidence or proof.
Synonym of vouchsafe (“to condescendingly or graciously give or grant (something)”).
To assert, aver, or declare (something).
In full vouch to warrant or vouch to warranty: to summon (someone) into court to establish a warranty of title to land.
Followed by over: of a vouchee (a person summoned to court to establish a warranty of title): to summon (someone) to court in their place.
To guarantee legal title (to something).
Often followed by for. To bear witness or testify; to guarantee or sponsor.
I can vouch that he wasn’t at the scene of the crime.
Often followed by for. To provide evidence or proof.
Often followed by for. To express confidence in or take responsibility for (the correctness or truth of) something.
Where this word comes from
The verb is derived from Middle English vouchen (“to call, summon; to provide; to make available, proffer; to affirm, declare formally”) [and other forms], from Anglo-Norman vocher, voucher, woucher, and Old French vocher, voucher, vochier (“to call, summon; to claim; to call upon, invoke; to denounce”) [and other forms], from Vulgar Latin *vocicāre, derived from Latin vocāre (“to call, summon; to call upon, invoke; to designate, name; to bring or put (into a condition or state”), ultimately from Proto-Indo-European *wekʷ- (“to sound out; to speak”). Verb sense 8.1 (“to summon (someone) into court to establish a warranty of title to land”) in the form vouch to warrant or vouch to warranty is a calque from Anglo-Norman and Old French voucher a garant. The noun is derived from the verb.
An assertion, a declaration; also, a formal attestation or warrant of the correctness or truth of something.
Where this word comes from
The verb is derived from Middle English vouchen (“to call, summon; to provide; to make available, proffer; to affirm, declare formally”) [and other forms], from Anglo-Norman vocher, voucher, woucher, and Old French vocher, voucher, vochier (“to call, summon; to claim; to call upon, invoke; to denounce”) [and other forms], from Vulgar Latin *vocicāre, derived from Latin vocāre (“to call, summon; to call upon, invoke; to designate, name; to bring or put (into a condition or state”), ultimately from Proto-Indo-European *wekʷ- (“to sound out; to speak”). Verb sense 8.1 (“to summon (someone) into court to establish a warranty of title to land”) in the form vouch to warrant or vouch to warranty is a calque from Anglo-Norman and Old French voucher a garant. The noun is derived from the verb.
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Definitions, grammatical labels, IPA, etymology and examples: Wiktionary contributors, extracted by Kaikki / Wiktextract. Adapted under CC BY-SA 4.0. Selected fields and authored examples are shown; third-party quotations and audio are omitted. See contributor history.
Last enriched 2026-09-10. Definitions are in English. Romanizations are shown when supplied by the source; syllable estimates are omitted for unsupported scripts.