Etymograph

English

vouch

Vouch comes from Middle English vouchen ‘to call, summon’, from Latin vōx ‘voice, speech’, and ultimately from Proto-Indo-European *wekʷ- ‘to speak’.

  1. Proto-Indo-Europeanc. 4500–2500 BCE*wekʷ-1‘to speak’reconstructed
  2. Proto-Indo-Europeanc. 4500–2500 BCE*wṓkʷs1‘speech, voice’reconstructedo-grade root noun of *wekʷ-
  3. Proto-Italicc. 1500–700 BCE*wōks1‘voice’reconstructed
  4. Latinc. 75 BCE–200 CEvōx2‘voice, speech’
  5. Latinc. 75 BCE–200 CEvoco3as vocāre‘to call, summon’
  6. Vulgar Latinc. 100–700 CE*vocicāre3‘to call’reconstructed
  7. Anglo-Normanc. 1066–1400vocher3
  8. Middle Englishc. 1150–1500vouchen3‘to call, summon’
  9. Englishearliest quotation 1531vouch3

attested reconstructed ? uncertain or disputed deepest recorded ancestor

  1. 1 Wiktionary, Latin vox
  2. 2 Wiktionary, Latin voco
  3. 3 Wiktionary, English vouch
  4. Earliest quotation in Wiktionary’s entry: 1531, Thomas Elyot, Of Experience whiche haue Preceded Our Tyme, with a Defence : “But the most catholike and renoumed doctours of Christes…”.

Lineage

  1. Proto-Indo-Europeanc. 4500–2500 BCE*wekʷ-Wiktionary, Latin vox‘to speak’reconstructed
  2. Proto-Indo-Europeanc. 4500–2500 BCE*wṓkʷsWiktionary, Latin vox‘speech, voice’reconstructedo-grade root noun of *wekʷ-
  3. Proto-Italicc. 1500–700 BCE*wōksWiktionary, Latin vox‘voice’reconstructed
  4. Latinc. 75 BCE–200 CEvōxWiktionary, Latin voco‘voice, speech’
  5. Latinc. 75 BCE–200 CEvocoWiktionary, English vouchas vocāre‘to call, summon’
  6. Vulgar Latinc. 100–700 CE*vocicāreWiktionary, English vouch‘to call’reconstructed
  7. Anglo-Normanc. 1066–1400vocherWiktionary, English vouch
  8. Middle Englishc. 1150–1500vouchenWiktionary, English vouch‘to call, summon’
  9. Englishearliest quotation 1531vouchWiktionary, English vouch. Earliest quotation in Wiktionary’s entry: 1531, Thomas Elyot, Of Experience whiche haue Preceded Our Tyme, with a Defence : “But the most catholike and renoumed doctours of Christes…”

The story

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.

Full etymology on Wiktionary

Linked words

through Proto-Indo-European *wekʷ- ‘to speak’

epic, wight, whit, epos, 30 more

through Proto-Italic *wōks ‘voice’

vocalist, voiceless, vocally, vocalize, 26 more

through Latin vōx ‘voice, speech’

voice, vocal, vox, invocation, vociferous, 26 more

through Latin voco ‘to call, summon’

invite, invitation, advocate, vocational, vie, provocative, provoke, invoke, provocation, vocation, irrevocable, provocateur, revocable, 30 more

Today it means

verb To call on (someone) to be a witness to something.

Sources

Sources: Wiktionary, “vouch”; the older steps come from the Wiktionary entries for Latin vox, Latin voco. By Wiktionary contributors, CC BY-SA 4.0, via kaikki.org (dump of Oct 3 2026); text adapted and restructured. Language periods are conventional ranges, not dates for this word. License.

Etymograph / Proto-Indo-European *wekʷ- / vouch

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