goodbye/gʊd'baɪ/

int. a word said when you are leaving sb or when sb else is leaving

int. 再见；再会：Goodbye, Mr. Smith. 再见，史密斯先生。

◇She didn't say goodbye to me. 她没有向我道别。

◇She kissed him goodbye. 她与他吻别。

构词good + bye