ruthless

adjective

ruth·​less ˈrüth-ləs How to pronounce ruthless (audio)
 also  ˈru̇th-
: having no pity : merciless, cruel
a ruthless tyrant
ruthlessly adverb
ruthlessness noun

Did you know?

If someone can be ruthless, can one also be ruthful?

Ruthless can be defined as "without ruth" or "having no ruth." So what, then, is ruth? The noun ruth, which is now considerably less common than ruthless, means "compassion for the misery of another," "sorrow for one's own faults," or "remorse." And, just as it is possible for one to be without ruth, it is also possible to be full of ruth. The antonym of ruthless is ruthful, meaning "full of ruth" or "tender." Ruthful can also mean "full of sorrow" or "causing sorrow." Ruth can be traced back to the Middle English noun ruthe, itself from ruen, meaning "to rue" or "to feel regret, remorse, or sorrow."

Examples of ruthless in a Sentence

The journalist was ruthless in his criticism. an office supervisor with a ruthless disregard for others' feelings
Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
The initial plan was to use the Indigenous Taino population to work the fields, but this population was quickly decimated by genocidal conquest, ruthless working conditions as well as novel diseases brought by the Europeans. Literary Hub, 29 July 2025 The role of Chris Partlow, Marlo Stanfield's top lieutenant and ruthless hitman, was the first screen credit for Gbenga Akinnagbe. Derek Lawrence, EW.com, 29 July 2025 In the film, a pair of mismatched armored truck drivers (Murphy and Davidson) find their routine cash pickup escalating into chaotic mayhem when they’re ambushed by ruthless criminals led by the savvy mastermind (Palmer). James Hibberd, HollywoodReporter, 28 July 2025 Much of the novel is devoted to the ruthless scheming of Renée’s husband, Saccard, a property speculator intent on profiting from the vast geographical changes afoot in Haussman’s Paris. Leslie Camhi, New Yorker, 25 July 2025 See All Example Sentences for ruthless

Word History

First Known Use

14th century, in the meaning defined above

Time Traveler
The first known use of ruthless was in the 14th century

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Cite this Entry

“Ruthless.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/ruthless. Accessed 2 Aug. 2025.

Kids Definition

ruthless

adjective
ruth·​less ˈrüth-ləs How to pronounce ruthless (audio)
: having no pity : merciless, cruel
ruthlessly adverb
ruthlessness noun

More from Merriam-Webster on ruthless

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