動詞 vouch:

1. give personal assurance; guarantee
2. give surety or assume responsibility
   同義詞：guarantee
3. summon (a vouchee) into court to warrant or defend a title
4. give supporting evidence

1. I can vouch for his honesty.
   我可以為他的誠實做擔(dān)保。
2. The experts have vouched for the painting's authenticity.
   專家已經(jīng)確認(rèn)了該畫是真跡。

vouch

v.（動詞）
vouched,vouch.ing,vouch.es
v.intr.（不及物動詞）
To give personal assurances; give a guarantee:
擔(dān)保，保證：給予個人擔(dān)保；給予保證：
例句：
vouch for an old friend`s trustworthiness.
擔(dān)保一個老朋友可信任

To constitute supporting evidence; give substantiation:
作證，證明：構(gòu)成支持的證據(jù)；給予證實：
例句：
a candidate whose strong record vouches for her ability.
候選人良好的記錄證實了她的能力

v.tr.（及物動詞）
To substantiate by supplying evidence; prove:
證實：用提供證據(jù)來證實；證明：
例句：
charges that he could not vouch.
對他的不能證實的控告

Law To summon as a witness to give warranty of title.
【法律】 傳喚…出庭作證：作為證人傳喚以給予權(quán)利的保證
To refer to (an authority, for example) in support or corroboration; cite.
引證：引用（如一個權(quán)威）來證實或支持；引證
To assert; declare.
斷言；宣稱
n.Obsolete （名詞）【廢語】
A declaration of opinion; an assertion.
證實，斷言：意見的宣布；斷言

來源：
Middle English vouchen [to summon to court, warrant]
中古英語 vouchen [傳喚出庭]
from Anglo-Norman voucher
源自 英法語 voucher
probably from Vulgar Latin *votic3re
可能源自 俗拉丁語 *votic3re
alteration of Latin vocit3re [frequentative of] voc3re [to call] * see wek w-
拉丁語 vocit3re的變化 [] voc3re的重復(fù)動詞 [召喚] *參見 wek w-