sword of Damocles

American  

noun

1. any situation threatening imminent harm or disaster.

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Sword of Damocles British  

noun

1. a closely impending disaster

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sword of Damocles Idioms  

1. Also, Damocles' sword. Impending disaster, as in The likelihood of lay-offs has been a sword of Damocles over the department for months. This expression alludes to the legend of Damocles, a servile courtier to King Dionysius I of Syracuse. The king, weary of Damocles' obsequious flattery, invited him to a banquet and seated him under a sword hung by a single hair, so as to point out to him the precariousness of his position. The idiom was first recorded in 1747. The same story gave rise to the expression hang by a thread.

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Etymology

Origin of sword of Damocles

First recorded in 1810–20

Example Sentences

But even then, the rare earths situation could stay unresolved, “hanging like a sword of Damocles over many companies’ heads,” Gave says.

From Barron's • Oct. 21, 2025

He said many veterans now effectively had a "sword of Damocles hanging over them again".

From BBC • Jul. 15, 2025

Yet, future funding is in jeopardy, with a sword of Damocles hanging over the new carbon market.

From Seattle Times • Nov. 26, 2023

The tragic message of Oppenheimer and “Oppenheimer” is that humankind has lived under a nuclear sword of Damocles ever since.

From Los Angeles Times • Jul. 31, 2023

The second week of January 1890, Jo writes to her sister, “It’s like a sword of Damocles forever hanging over our heads—I never really have a moment’s peace.”

From "Vincent and Theo: The Van Gogh Brothers" by Deborah Heiligman