vouch

verbs

give personal assurance; guarantee
"Will he vouch for me?"
vouch
is derived from
voucher
is a type of (narrower)
give testimony in a court of law
attest, bear witness, take the stand, testify
give surety or assume responsibility
"I vouch for the quality of my products"
guarantee, vouch
is derived from
voucher
summon (a vouchee) into court to warrant or defend a title
vouch
is derived from
vouchee
is a type of (narrower)
call in an official matter, such as to attend court
cite, summon, summons
give supporting evidence
"He vouched his words by his deeds"
vouch
is a type of (narrower)
establish or strengthen as with new evidence or facts
"his story confirmed my doubts"; "The evidence supports the defendant"
affirm, confirm, corroborate, substantiate, support, sustain