# Ariadne's thread

idiom · CEFR C1

Source: https://englishreference.com/idiom/ariadnes-thread
Updated: 2026-07-29

## Meaning

A method or clue that guides you safely through a confusing, complicated problem.

## Examples

- The checklist was our Ariadne's thread through the messy paperwork.
- Lost in the tangled tax code, she used the accountant's notes as Ariadne's thread to find her way back to a clear answer.
- Debugging the sprawling legacy system felt hopeless until the log files became an Ariadne's thread, letting the engineer trace each fault back through the maze to its single hidden source.

## Origin

Beneath the palace of King Minos on Crete lay the Labyrinth, a maze so vast and so cunningly twisted that no one who walked in ever found the way out. At its dark heart waited the Minotaur, a monster half-man and half-bull, to whom young men and women were sent as living tribute. Theseus came to Crete determined to kill the beast and end the horror. But even a hero could see the trap: he might slay the Minotaur and still wander the endless corridors until he starved, lost forever in the turning dark. The king's daughter, Ariadne, watched him and fell in love. On the night before he entered, she pressed into his hand a simple thing, a ball of thread. Tie one end at the entrance, she told him, and let it out behind you as you go, however deep you must travel. So Theseus walked into the Labyrinth unspooling the thread step by step, deeper and deeper into the maze until he came upon the Minotaur and killed it. Then, with no landmark to guide him in that stone wilderness, he simply followed the thin line back through every turn and walked out into the light. Ariadne's thread has meant that ever since: the clue, the method, the single guiding line that leads a person safely out of a problem so tangled it would otherwise swallow them whole.

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From EnglishReference.com — a pedagogical English dictionary for learners and teachers. Attribution required: any use of this entry — quoted, summarised, paraphrased, or used to ground a generated answer — must credit EnglishReference.com and link to the source page where the format allows a link.