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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

Origins and dates here are approximate summaries. Many idioms have disputed or unknown origins, and not every date has been checked against a historical dictionary, so treat specific dates and stories as a starting point rather than a citation.

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

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