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Region: US / UK | Usage example: Our argument is water under the bridge now that we’ve resolved it.

Water under the bridge

Meaning

Past events that are forgiven or no longer important.

Usage

Common in reconciliations and conversations about moving on.

Origin & History

Origin notes can vary by region and source; this page gives the commonly reported explanation and usage context.

Imagery of water flowing away to signify events that cannot be retrieved.

Appears in 19th-century writing describing past misfortunes being left behind.