vt.断言；保证
Millions were ready to avouch the exact contrary. 亿万人愿断言事实恰恰相反。
He offered to avouch his innocence with his sword. 他表示愿以剑来保证他是无辜的。
We can avouch for the quality. 我们保证质量。
n.断言；保证；声言
