Vouch

Verb

 * 1) To take responsibility for; to express confidence in; to witness; to obtest.
 * 2) To warrant; to maintain by affirmations; to attest; to affirm; to avouch.
 * 3) To back; to support; to confirm.
 * 4) To call into court to warrant and defend, or to make good a warranty of title.
 * 5) To bear witness; to give testimony or full attestation.
 * 6) To assert; to aver; to declare.

Noun

 * 1) Warrant; attestation.

Thesaurus
acknowledge, affirm, affirmance, affirmation, allegation, allege, and candle, announcement, annunciation, assert under oath, assertion, asseverate, asseveration, assure, attest, aver, averment, avouch, avouchment, avow, avowal, back up, bear witness, book, certify, conclusion, confirm, corroborate, countersign, creed, declaration, depone, depose, dictum, disclose, endorse, enunciation, give evidence, guarantee, ipse dixit, kiss the book, make a promise, manifesto, pledge, plight, position, position paper, positive declaration, predicate, predication, proclamation, profession, promise, pronouncement, proposition, protest, protestation, prove, say, say-so, saying, sponsor, stance, stand, statement, substantiate, support, swear, swear by bell, swear the truth, swear to, swear to God, swear to goodness, testify, troth, underwrite, uphold, utterance, verify, vouch for, vow, warrant, witness, word

Etymology
From voucher:, from  voco:.

Verb

 * Simplified Chinese:


 * Russian:


 * French: entériner
 * Russian:


 * Simplified Chinese:


 * Russian: вызывать в суд


 * Russian: давать показания


 * Simplified Chinese: ,


 * French: attester


 * Simplified Chinese: