The origin of the idiom "rain cats and dogs" may have derived from the Old English word "catadupe," meaning a waterfall or cataract, which later evolved into "cat-and-dog" rain. This idiomatic expression is used to describe heavy or torrential rainfall. It implies that the rain is falling with great intensity, often accompanied by a loud or forceful sound.

Définition et signification de « rain cats and dogs » en anglais

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