The Origin of Clues - 5.0 out of 5 based on 4 votes

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The word “clue,” as in “a piece of evidence used as a guide in solving a mystery or a problem,” originally means “a ball of thread,” and it was spelled “clew.” What’s thread got to do with clues? The answer is in the story of Ariadne, Theseus and the Minotaur.

In Greek mythology the Minotaur is a violent monster, half human and half bull, born on the island of Crete. To keep it from hurting people, the king of the island makes Daedalus, an inventor and architect, create a labyrinth that the Minotaur will never be able to escape.

One version of the Labyrinth

Then one day the king’s son is killed in Athens. The king goes to war against Athens, wins, and as a punishment forces Athens to send seven girls and seven boys to Crete every year, or every seven years, depending on the version of the myth. The girls and boys are forced into the labyrinth, where they are eaten by the Minotaur.

House of Theseus Mosaic, c.3rd century, Paphos, Cyprus

One year Theseus, the son of the king of Athens, decides to go to Crete in order to kill the Minotaur and stop the sacrifices. When Theseus arrives in Crete he meets Ariadne, the king’s daughter, and she falls in love with him. Theseus tells Ariadne that he intends to kill the Minotaur and that he will marry her if she helps him. That’s when Ariadne gives him a ball of thread, called a “clew,” which Daedalus had given her, and she tells Theseus how to find his way back out of the labyrinth with it:

Nicolo Bambini, Ariadne and Theseus, early 18th century, Private Collection

Theseus ties one end of the thread to the door of the labyrinth, manages to find and kill the Minotaur deep inside the labyrinth, and then follows the thread back out.

The word “clew” therefore always meant both “a ball of thread” and “something that guides a person out of a difficult or mysterious situation.” The spelling changed from “clew” to the modern “clue,” and the word we use today was born. That’s the origin of clues in English.