Question

water under the bridge - We use to argued every time we saw each other, but that's now water under the bridge.  - I tried to apologize for what I'd said, but he was good enough to tell me that it was water under the bridge for him.

Accepted Answer

you use this expression to say that something is finished and there is no point or need to think or worry about it any longer

Idiom	water under the bridge
Definition	you use this expression to say that something is finished and there is no point or need to think or worry about it any longer
Examples	- We use to argued every time we saw each other, but that's now water under the bridge. - I tried to apologize for what I'd said, but he was good enough to tell me that it was water under the bridge for him.

Water Bridge Expression Finished Point Worry Longer Argued