to say that you believe that sth is true or good because you have evidence for it
SYN confirm :
I was in bed with the flu. My wife can vouch for that.
to say that you believe that sth is true or good because you have evidence for it
SYN confirm :
I was in bed with the flu. My wife can vouch for that.
Oxford Advanced Learner's English Dictionary. Оксфордский английский словарь для изучающик язык на продвинутом уровне. 2005