When we say something is “water under the bridge“, we mean that it is a past event, mistake, or misunderstanding that has been resolved, forgiven, or forgotten. It’s a way of saying “let’s not worry about that anymore” or “that’s in the past.”
Here are two examples in sentences:
Example 1:
Even though they had a huge fight last year, it’s all water under the bridge now, and they are best friends again.
Example 2:
I know I made a mistake, but that’s water under the bridge. I have learned from it and moved on.
Now, let’s see two examples in a conversation:
Example 3:
Mark: I’m really sorry about what I said last week.
Emma: It’s okay, Mark. That’s all water under the bridge now. Let’s move forward.
Example 4:
Jack: Are you still mad at me for forgetting your birthday?
Lily: No, Jack, it’s water under the bridge. I know you didn’t mean to forget it.
So, when you hear someone say something is “water under the bridge“, they are indicating that a past problem, mistake, or disagreement should not affect the current situation or relationship because it has been resolved or forgiven.