形容词

名词

1. 过去已久的；很久以前的
Bygone means happening or existing a very long time ago.

2. 让过去的事过去；冰释前嫌
If two people let bygones be bygones, they decide to forget about unpleasant things that have happened between them in the past.

1. past events to be put aside

e.g. let bygones be bygones

Synonym: water under the bridge