IdiomNatureEnglish

leave no stone unturned

Meaning: To search everywhere.

Example: “The detectives left no stone unturned in their search for the missing child.”

Origin: Often traced to an ancient Greek story told by Euripides and others: after a Persian general hid treasure near Plataea, the searchers were told by the Delphic oracle to turn over every stone. The English phrase is recorded from the 16th century.

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