I. ˈvau̇ch verb
Etymology: Middle English vochen, vouchen, from Anglo-French voucher to call, vouch, from Latin vocare to call, summon, from vox voice — more at voice
Date: 14th century
transitive verb
1. : to summon into court to warrant or defend a title
2. archaic
a. : assert , affirm
b. : attest
3. archaic : to cite or refer to as authority or supporting evidence
4.
a. : prove , substantiate
b. : to verify (a business transaction) by examining documentary evidence
intransitive verb
1. : to give a guarantee : become surety
2.
a. : to supply supporting evidence or testimony
b. : to give personal assurance
Synonyms: see certify
II. noun
Date: 1603
obsolete : allegation , declaration