goodbye

再见、再会、拜拜

Goodbye, and thanks for everything you've done for us.

再见，谢谢你为我们做的一切。

道别、告别

We said our goodbyes at the airport and boarded separate flights.

我们在机场道别，然后各自搭上不同的班机。

诀别、永别常与 final 连用

She hugged him tightly, knowing this was their final goodbye.

她紧紧抱住他，知道这是他们最后一次的诀别。

告别、失去、不再拥有口语

If the funding is cut, you can say goodbye to the whole project.

要是经费被砍，这整个专案就别想了。