Water under the bridge.
[Idiom] WATER UNDER THE BRIDGE. - Understanding Commonly Used Idioms in Everyday Conversation
Past and forgiven issues.
Use the expression "water under the bridge" to talk about events or disagreements that happened in the past and are no longer considered important or worth worrying about. It suggests a forgiving attitude and a focus on moving forward rather than dwelling on past conflicts.
Example Sentences
Let's forget our past arguments; it's all water under the bridge now.
Let's forget our past arguments; it's all forgotten now.
He apologized for his mistake; it's water under the bridge.
He apologized for his mistake; it's forgiven and forgotten.
They used to be rivals in business, but now that's all water under the bridge.
They used to be business rivals, but that's all in the past now.