ruthless

adjective

ruth·​less ˈrüth-ləs How to pronounce ruthless (audio)
also ˈru̇th-
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.
Tony and Cameron are recklessly ruthless and so fun to watch. Aramide Tinubu, Variety, 15 May 2026 Beth and Rip’s hopes for peaceful transitition, however, are threatened by Beulah Jackson (Annette Bening), the powerful matriarch of a ruthless rival ranch. Tim Lammers, Forbes.com, 15 May 2026 When a ruthless despot steals a billion-dollar fortune, the team is sent to steal it back on what would be for anyone else a suicide mission. Anthony D'alessandro, Deadline, 14 May 2026 Assayas offers anecdotes, a feuilleton of tyranny in which the foibles of the mighty and the ruthless reveal the sentimental side of cruelty, the amusement value of ugly deeds, and the polite side of monstrous ideas. Richard Brody, New Yorker, 13 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 20 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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