ruthless

adjective

Synonyms of ruthless
: 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.
One stronghold after another has fallen to the ruthless conqueror Nobunaga Oda—often celebrated as the first great unifier of Japan but here cast as a largely offscreen mega-villain. Justin Chang, New Yorker, 30 July 2026 The actress, who became a television sensation playing the glamorous and ruthless Abby Cunningham on the hit show, said the platform will give her a chance to connect with fans in a more personal way. Stephanie Giang-Paunon, FOXNews.com, 30 July 2026 The author's personal journey highlights how ruthless prioritization, risk management, and resourcefulness, born from necessity, became foundations for financial stability. Kristin Vance Richards, Forbes.com, 29 July 2026 In Season 2, the ruthless, backstabbing family behind a beauty brand — and an underground trafficking ring — will face a reckoning. Rosy Cordero, Deadline, 28 July 2026 See All Example Sentences for ruthless

Word History

Etymology

Middle English rewthles, routheeles, from rewthe, routhe "pity, ruth" + -les -less

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. 2026.

Kids Definition

ruthless

adjective
: having no pity : merciless, cruel
ruthlessly adverb
ruthlessness noun

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