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.
That day, Spurs came up against a very clever, ruthless, pressing team and were made to look clueless on the ball. Jack Pitt-Brooke, New York Times, 29 Sep. 2025 Voight portrayed Coach Bud Kilmer, the ruthless football coach obsessed with winning. Tereza Shkurtaj, PEOPLE, 28 Sep. 2025 In another example of a ruthless campaign to crush dissent, Cuban authorities sentenced the wife of a Cuban political prisoner to 14 years in prison for charges of acting against state security, for which she had been previously acquitted due to lack of evidence. Nora Gamez Torres, Miami Herald, 25 Sep. 2025 As the dynasty outsider, Henry (Boszhardt) must battle his ruthless stepmother (Gershon), who is under the influence of a demon that feeds on greed. Andreas Wiseman, Deadline, 24 Sep. 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 6 Oct. 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

Last Updated: - Updated example sentences
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