good-bye

int.

1. 再见！
   "Good-bye, dear," she said.

   “再见，亲爱的，”她说。

n.

1. 告辞；告别[U][C]
   I must say good-bye now.

   我现在得告辞了。

   If you lend him money, you can kiss it good-bye.

   如果你借给他钱，你就甭想他还你。