to declare (something) to be true or genuinethat auction house will always testify to a painting's authenticity
that auction house will always testify to a painting's authenticity
attest, authenticate, avouch, certify, vouch (for), witness
guarantee, warrantaffirm, assert, aver, avow, profess, vow
英语同义词词典收录了63618条英语词条，基本涵盖了全部常用同义词或反义词的辨析及翻译，是英语学习的有利工具。