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.
There is the ruthless spymaster Luthen Rael (Stellan Skarsgård) and his mysterious assistant Kleya (Elizabeth Dulau). Erik Kain, Forbes.com, 21 Apr. 2025 O’Neil had shown a more ruthless streak in dealing with Lemina, stripping the midfielder of the captaincy after those embarrassing post-match scenes at West Ham. Steve Madeley, New York Times, 21 Apr. 2025 Elusive professional fixer Ash has his skills put to the test while protecting whistleblower Sarah Grant from increasingly ruthless corporate mercenaries in this breathless, New York-set thriller. Katcy Stephan, Variety, 16 Apr. 2025 He's been portrayed as a ruthless businessman, an evil scientist, and a vain politician, while actors have played the supervillain with differing strains of campy flash and genuine menace. Randall Colburn, EW.com, 12 Apr. 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 30 Apr. 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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