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Synonyms

murderous

American  
[mur-der-uhs] / ˈmɜr dər əs /

adjective

  1. of the nature of or involving murder.

    a murderous deed.

  2. guilty of, bent on, or capable of murder.

  3. extremely difficult, dangerous, or unpleasant.

    murderous heat.


murderous British  
/ ˈmɜːdərəs /

adjective

  1. intending, capable of, or guilty of murder

  2. informal very dangerous, difficult, or unpleasant

    a murderous road

"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

  • murderously adverb
  • murderousness noun
  • nonmurderous adjective

Etymology

Origin of murderous

First recorded in 1525–35; murder + -ous

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.

And yet how many Americans haven’t stared down a hardwood alley with murderous intent, preparing to unload a polished missile against 10 arrogant pins?

From The Wall Street Journal • Mar. 12, 2026

Keith David, who plays real-life activist minister Henry H. Garnet, gives a seven-minute speech on education as if he’s performing a Shakespearean monologue, after which he faces down a murderous sheriff like he’s Shaft.

From Los Angeles Times • Feb. 26, 2026

To be clear, the incident, shown from a couple different angles, does not show murderous intent from the driver.

From Slate • Jan. 7, 2026

The single combat involves swinging a conker -- a hardened horse chestnut -- on a string at your opponent's nut with murderous venom, until one is smashed to pieces.

From Barron's • Oct. 17, 2025

A beautiful French spy escapes murderous Gestapo agents in Paris; in the North Sea, British navy sailors brave a suicide mission against enemy submarines.

From "A Thousand Sisters" by Elizabeth Wein