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Synonyms

ruthless

American  
[rooth-lis] / ˈruθ lɪs /

adjective

  1. without pity or compassion; cruel; merciless.

    a ruthless tyrant.

    Synonyms:
    relentless, adamant, unrelenting

ruthless British  
/ ˈruːθlɪs /

adjective

  1. feeling or showing no mercy; hardhearted

"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

Synonym Usage

See cruel.

Other Word Forms

Etymology

Origin of ruthless

First recorded in 1300–50; Middle English; ruth + -less

Explanation

Ruthless means showing no mercy or compassion. If you really want to cut down on the clutter in your apartment, you can't be sentimental about keepsakes. You have to be ruthless and throw out everything that's not absolutely essential. If you're ruthless, you're the polar opposite of Mother Theresa. You get called heartless and cold-blooded. That's one of the reasons the word crops up so often to describe dictators and tyrants, though it can also apply to other personality types — like corporate raiders and colleagues so success-driven that they'll gladly steamroll anyone to get ahead. It finds its way into milder contexts, too: Just be ruthless and rip off the Band-Aid already!

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Vocabulary lists containing ruthless

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.

See Examples For:

“We play only where we have real competitive advantage, or we can build one, and we’re ruthless about where we put our money,” said Ford Chief Executive Jim Farley in a call Tuesday with analysts.

From The Wall Street Journal Jul. 28, 2026

He received two Daytime Emmy nominations for his portrayal of the charming but ruthless businessman, whom he portrayed off and on from 1982 to 2008.

From Los Angeles Times Jul. 14, 2026

They need to be better, they need to create and be ruthless.

From BBC Jun. 24, 2026

You could call that ruthless economic warfare, or you could call it capitalist competition, an arena where the Chinese have excelled.

From Salon Jun. 21, 2026

Occasionally the heroes “rejoice in the delight of Ares’ battle,” but far oftener in having escaped “the fury of the ruthless god.”

From "Mythology: Timeless Tales of Gods and Heroes" by Edith Hamilton

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