ruthless

adjective

ruth·​less ˈrüth-ləs How to pronounce ruthless (audio)
also ˈru̇th-
Synonyms of ruthlessnext
: 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 seven-time Super Bowl champion, 48, made a surprise guest appearance on Netflix's The Roast of Kevin Hart on Sunday, May 10, joining a dais of A‑listers with raw and ruthless digs at the comedian, 46, who sat in the hot seat at Los Angeles' Kia Forum. Skyler Caruso, PEOPLE, 11 May 2026 When a chance encounter with a distraught stranger on a subway goes horribly wrong, Reacher is drawn into a complex and deadly game that pits him against ruthless foes from the highest echelons of power. Rosy Cordero, Deadline, 11 May 2026 The ads from both sides describe an unscrupulous, moneyed and ruthless entity preying on people at their most vulnerable moments. Sacbee.com, 8 May 2026 Reduce Wasted Spend to Fund Your Next Project Founders are ruthless about cutting overhead, yet many creatives let thousands of dollars leak away on essential work expenses like software subscriptions, tech and supplies. Rhett Power, Rolling Stone, 6 May 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 13 May. 2026.

Kids Definition

ruthless

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

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