forgive and forget
US /fərˈɡɪv ænd fərˈɡɛt/
UK /fərˈɡɪv ænd fərˈɡɛt/

1.
既往不咎, 不念旧恶
to stop feeling angry with someone for something they have done and to not remember it or allow it to affect future relationships
:
•
It's time to forgive and forget what happened between us.
是时候既往不咎了,忘记我们之间发生的事情吧。
•
After their big argument, they decided to forgive and forget.
大吵一架后,他们决定既往不咎。