vouch: [14] Vouch originally meant ‘call as a witness’; ‘guarantee’ is a 16th-century development. The word was borrowed from Old French voucher ‘summon’, which in turn appears to have evolved from Latin vocāre ‘call’ (source of English vocation, vocative, etc). Anglo-Norman used the Old French infinitive verb as a noun, meaning ‘summons’, from which English gets voucher [16]. Vouchsafe [14] originated as a compound of vouch ‘guarantee’ and safe. => vocation
vouch (v.)
early 14c., "summon into court to prove a title," from Anglo-French voucher, Old French vocher "to call, summon, invoke, claim," probably from Gallo-Roman *voticare, metathesis of Latin vocitare "to call to, summon insistently," frequentative of Latin vocare "to call, call upon, summon" (see voice (n.)). Meaning "guarantee to be true or accurate" is first attested 1590s. Related: Vouched; vouching.
例文
1. Kim 's mother agreed to vouch for Maria and get her a job.
金の母親はマリアに仕事を探すために保証することに同意した。
2.He cannot vouch for the accuracy of the story.
彼はこの説の正確性を証明できない。
3.They asked whether I was prepared to vouch for him.
彼らは私に彼のために保証したいかどうかを尋ねた。
4.I can vouch for the fact that he is a good worker.
彼が良い従業員であることを保証します。
5.I was in bed with flu.My wife can vouch for that/me.