Confirmed that something is true or reliable; said that you believe in someone's honesty or ability ('vouched for').
From Old French 'voucher' (to call, summon), from Latin 'vocare' (to call). Meaning evolved from 'call to witness' to 'testify' to modern 'confirm reliability.'
When someone 'vouches for' you, they're essentially putting their own reputation on the line—which is why character references matter so much in job interviews and credit applications; it's one person betting their credibility on yours.
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