avouch

动词 avouch:

1. admit openly and bluntly; make no bones about
   同义词：avow

a.vouch

v.tr.（及物动词）
a.vouched,a.vouch.ing,a.vouch.es
To declare the provable truth or validity of; affirm:
断言：声称是可以证实的事实或其有效性；肯定：
例句：
She avouched that she herself was innocent.
她证实了她自己是无辜的

To vouch for.
为…证实
To accept responsibility for (an action, for example); acknowledge.
承担：为（如某一行为）承担责任；确认
To avow; confess.
承认；坦白

来源：
Middle English avouchen [to cite as a warrant]
中古英语 avouchen [作为担保引用]
from Old French avochier
源自 古法语 avochier
from Latin advoc3re [to summon] * see advocate
源自 拉丁语 advoc3re [召唤] *参见 advocate