vouch
verb [ + that ] uk/vaʊtʃ/ us/vaʊtʃ/
担保;证明;作证
to be able from your knowledge or experience to say that something is true
As a medical examiner I can vouch that his death was accidental. 作为法医，我可以确定他是意外死亡。
Phrasal verb
vouch for something/someone 为…担保;保证
to say that you know from experience that something is true or good, or that someone is honest and has a good character
Patricia has checked the reports and can vouch for the accuracy of the information. 帕特里夏已经核实过报告，可以保证信息的准确性。