ruthless

1 of 2

adjective

Synonyms of ruthless
: having no pity : merciless, cruel
a ruthless tyrant
ruthlessly adverb
ruthlessness noun

ruthlessness

2 of 2

noun

ruth·​less·​ness
plural -es
: the quality or state of being ruthless

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."

Synonyms of ruthless

Examples of ruthless in a Sentence

Adjective The journalist was ruthless in his criticism. an office supervisor with a ruthless disregard for others' feelings
Recent Examples on the Web
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Adjective
Natural selection is usually ruthless about weeding out traits with no function. Scott Travers, Forbes.com, 2 July 2026 With such an inexperienced side on show, England looked disorganised and devoid of ideas as they were put to the sword by ruthless, relentless opponents. Hector Vickers, New York Times, 21 June 2026 With ruthless competitors who will stop at nothing to dethrone and destroy them, the Whitlocks are a blue-collar dynasty at the edge of extinction – and the old king is fighting to hold onto the crown. Matt Grobar, Deadline, 23 June 2026 Kara also runs afoul of this crew, and their ruthless and eccentric leader Krem of the Yellow Hills (Matthias Schoenaerts) poisons her beloved Krypto. Brian Truitt, USA Today, 24 June 2026 See All Example Sentences for ruthless

Word History

Etymology

Adjective

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

First Known Use

Adjective

14th century, in the meaning defined above

Noun

1777, 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 8 Jul. 2026.

Kids Definition

ruthless

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

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