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Synonyms

endanger

American  
[en-deyn-jeyr] / ɛnˈdeɪn dʒeɪr /

verb (used with object)

  1. to expose to danger; imperil.

    It was foolish to endanger your life in that way.

    Synonyms:
    risk, hazard, jeopardize, threaten

endanger British  
/ ɪnˈdeɪndʒə /

verb

  1. (tr) to put in danger or peril; imperil

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Other Word Forms

  • endangerment noun

Etymology

Origin of endanger

late Middle English word dating back to 1400–50; see origin at en- 1, danger

Explanation

To endanger someone is to put them in a dangerous position, or to threaten their safety. It would endanger your little brother if you encouraged him to jump off the garage roof into a pile of leaves. Texting while you drive is a good way to endanger yourself, as well as your passengers and anyone else nearby. Scientists warn that climate change will slowly begin to endanger many plant and animal species on Earth, possibly including humans. This 15th century word combines the prefix en-, "make or put in" with danger, from the Old French dangier, "power to harm."

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Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

But “we will not accept foreign companies who create little added value and endanger Hungary’s land, air and water.”

From Barron's • Apr. 17, 2026

Hobbs’ administration is taking these steps “to avoid staggering fines of hundreds of millions of dollars that would further endanger food assistance for vulnerable Arizonans,” Soto said in a statement.

From Salon • Apr. 9, 2026

Holding Kharg Island, Iran’s oil-export terminal, would endanger U.S. troops without necessarily forcing Iran’s hand in the Strait of Hormuz.

From The Wall Street Journal • Apr. 2, 2026

Criminalizing this work without consequence doesn’t just endanger those journalists; it threatens everyday Americans who rely on local and national reporting in nearly all aspects of their lives.

From Slate • Mar. 26, 2026

Did I consider that my decision might endanger our family?

From "Warriors Don't Cry: A Searing Memoir of the Battle to Integrate Little Rock's Central High" by Melba Pattillo Beals