v.保证，担保；断言，公开承认，主张

原形：avouch第三人称单数：avouched过去式：avouched过去分词：avouched现在分词：avouching

He avouched that he had seen the alien.
他宣称他见过外星人。
The witness avouched to the authenticity of the document.
证人证实了文件的真实性。
She firmly avouched her innocence before the jury.
她在陪审团前坚决地声明自己的清白。
The expert avouched the painting as an original masterpiece.
专家证实那幅画是原创的杰作。
He avouched his loyalty to the company by working overtime.
他通过加班来证明他对公司的忠诚。
The politician avouched that the new policy would benefit everyone.
政客宣称新政策将惠及所有人。
The archaeologist avouched the discovery of an ancient civilization.
考古学家宣称发现了古代文明。
She avouched having completed the project weeks ahead of schedule.
她证实已经提前几周完成了项目。
The teacher avouched the student's exceptional academic performance.
老师证实了学生出色的学习表现。
He avouched his commitment to the environment by adopting eco-friendly habits.
他通过采取环保习惯来证明他对环境的承诺。