Valediction /ˌvæl.əˈdɪk.ʃən/ n. (尤指正式的)告别,告别词
meaning: the act of saying goodbye, especially formally, or a formal speech in which someone says goodbye
1) 词根:vale-再见(value 价值)
2) 词根:dict- 说话(dictionary 字典)
3) 后缀:-ion 名词后缀
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