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.
For Arsenal, the mission to create their best possible squad for depth and quality requires some upgrades in certain areas, and Berta won’t mind being ruthless if a sacrifice here leads to a new crowning there. Kaya Kaynak, New York Times, 14 Aug. 2026 The public restrooms are controlled by a ruthless corporation, and anyone who refuses to pay is sent to the mysterious Urinetown. Randy McMullen, Mercury News, 13 Aug. 2026 Her portrayal of Abby Cunningham on Knots Landing helped define the prime-time soap’s appeal, with the character’s romances becoming just as talked about as her ruthless ambition. Tereza Shkurtaj, PEOPLE, 8 Aug. 2026 With her Demonic transformation, Rauch added a whole new shade of dark to Big Bang alums’ returns for the spinoff, following Kaley Cuoco’s ruthless Penny in Episode 2 and Kunal Nayyar’s deeply depressed Raj in Episode 1. Nellie Andreeva, Deadline, 6 Aug. 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 17 Aug. 2026.

Kids Definition

ruthless

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

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