testimonial
/ˌtestɪˈməʊnɪəl, -nɪəl/noun
1- a formal statement testifying to someone's character and qualifications（品德、资格的）证明书; 介绍信, 推荐信。
1.1
- a public tribute to someone and to their achievements感谢（或赞赏）表示; 奖状; 感谢信; 纪念品。
1.2
- often as modifier(in sport) a game or event held in honour of a player, who typically receives part of the income generated（体育运动中为纪念某个运动员而举办的）纪念赛（或项目）：
he has been granted a testimonial match.
同意为他举办纪念赛。
词源
late Middle English: from Old French testimonial 'testifying， serving as evidence'， from late Latin testimonialis, from Latin testimonium （see TESTIMONY）.