• WordNet 3.6
    • adj relentless never-ceasing "the relentless beat of the drums"
    • adj relentless not to be placated or appeased or moved by entreaty "grim determination","grim necessity","Russia's final hour, it seemed, approached with inexorable certainty","relentless persecution","the stern demands of parenthood"
    • ***
Webster's Revised Unabridged Dictionary
  • Interesting fact: In 1949, forecasting the relentless march of science, Popular Mechanics said "Computers in the future may weigh no more than 1.5 tons."
    • a Relentless Unmoved by appeals for sympathy or forgiveness; insensible to the distresses of others; destitute of tenderness; unrelenting; unyielding; unpitying; as, a prey to relentless despotism. "For this the avenging power employs his darts, . . .
      Thus will persist, relentless in his ire."
    • ***
Century Dictionary and Cyclopedia
    • relentless Incapable of relenting; unmoved by pity; unpitying; insensible to the distress of others; destitute of tenderness.
    • relentless Synonyms Implacable, etc. See inexorable, and list under unrelenting.
    • ***
Chambers's Twentieth Century Dictionary
    • Relentless without relenting: without tenderness or compassion: merciless
    • ***


  • John Welch
    John Welch
    “Good business leaders create a vision, articulate the vision, passionately own the vision, and relentlessly drive it to completion.”
  • Source Unknown
    Source Unknown
    “A person is not given integrity. It results from the relentless pursuit of honesty at all times.”
  • William E. Gladstone
    “Men are apt to mistake the strength of their feeling for the strength of their argument. The heated mind resents the chill touch and relentless scrutiny of logic.”
  • Pearl S. Buck
    “Nothing and no one can destroy the Chinese people. They are relentless survivors.”
  • Denis Waitley
    “Relentless, repetitive self talk is what changes our self-image.”
  • R. Scott Richards
    R. Scott Richards
    “Truth can be a dangerous thing. It is quite patient and relentless.”


Chambers's Twentieth Century Dictionary
O. Fr. ralentir, to retard—L. relentescĕrere-, back, lentus, pliant.


In literature:

But not of pursuit, for on came the rabble after me, steady, dogged, relentless, and still in grim silence.
"Dracula's Guest" by Bram Stoker
Potts stepped aside to look into the window, and the curtain of that descended relentlessly.
"The Boss of Little Arcady" by Harry Leon Wilson
It is steady and relentless.
"The Wolf's Long Howl" by Stanley Waterloo
Relentless as fate the St. Eustace forwards surged on toward the opposing goal.
"The Half-Back" by Ralph Henry Barbour
Winter, dead and relentless, held its sway.
"Where the Trail Divides" by Will Lillibridge
Suddenly she felt all the oppression and sorrow of the sex bear down upon her and mark her with its relentless finger.
"The Blood Red Dawn" by Charles Caldwell Dobie
By constant and relentless severity Herod still strengthened his rule.
"The World's Greatest Books, Vol XI." by Edited by Arthur Mee and J.A. Hammerton
His face was darkly passionate, his whole bearing that of a man relentlessly set upon obtaining the mastery.
"The Lamp in the Desert" by Ethel M. Dell
Lablache was certainly a triumph of relentless purpose over flesh and feelings.
"The Story of the Foss River Ranch" by Ridgwell Cullum
Getting to his feet, he looked down at her with the hard, relentless eyes that had made his name a terror.
"Mavericks" by William MacLeod Raine

In poetry:

Ah! wound then my relentless fair,
For thy own sake and mine,
That boundless may be my share,
And double glory thine.
"Songs Set To Music: 9. Set" by Matthew Prior
RELENTLESS foe to human peace,
Why fix thy dwelling here?
Why triumph o'er the wounded heart,
And force the bitter tear?
"To Disappointment" by Elizabeth Bath
Wildly leaping, madly sweeping,
All relentless in their sway,
Like a band of cruel demons
Flames were closing 'round our way
"Our Hero" by Frances Ellen Watkins Harper
Alas! alas! they took no heed
How frail she was, my little one,
But brought her here with cruel speed
Beneath the fierce, relentless sun.
"Sunstroke" by Laurence Hope
Ah fate relentless! thus to cheat
With baneful lure and treach'rous smile!
Were human suff'rings not complete
Till wreck'd on Kilda's desert isle!
"The Harp. A Legendary Tale. In Two Parts" by Hector MacNeill
Aroused and angry,
I thought to beat the alarum, and urge relentless war;
But soon my fingers fail'd me, my face droop'd, and I resign'd
To sit by the wounded and soothe them, or silently watch the dead.
"Drum-Taps" by Walt Whitman

In news:

A relentless Marylon Rose called or visited 3,000 vendors before she started the Sacramento Antique Faire under the W-X freeway about eight years ago.
Multiple residents were displaced after fire gutted an apartment building Tuesday at the intersection of National and Trestlework Rogers roads, bringing firefighters from around the Ohio Valley to battle the relentless flames.
The relentless defense, the motion offense that leads to layups, and the long runs that seemingly take the Wildcats opponents out of the game early and often at Fulton.
For months, conservatives yelled from the rooftops about how 2012 presented the sharpest choice ever in governing philosophies…e were told relentlessly that Obama was a tax-and-spend liberal.
Some Nuri Cops acknowledge that they are fighting an increasingly difficult battle against a relentless enemy.
Silvey, 49, of Houston was arrested on a felony stalking charge for allegedly hounding her ex at a relentless pace.
A relentless voice for clean energy.
The Lunenburg High field hockey team tried its best Tuesday, but simply couldn't keep up with the Tigers' relentless attack.
Microsoft decided to run a relentlessly negative twitter campaign called #droidrage, where people.
Blast Consumers Relentlessly With Retargeting and They'll Grow to Resent Your Brand.
Defensive end was relentlessly competitive, often productive during his five seasons with Tennessee More.
The relentless booing of the Yankees' Robinson Cano by Kansas City fans during the All-Star Home Run Derby on Monday night drew national attention, and in some places scorn.
Bears bracing for 'relentless' Peterson.
You saw ugly, but you also saw relentless.
First installment of the Tolkien child's tale is richly realized yet relentlessly padded.

In science:

H¨aggstr¨om, O., Peres, Y. and Schonmann, R. (1999) Percolation on transitive graphs as a coalescent process: relentless merging followed by simultaneous uniqueness.
Coupling and Bernoullicity in random-cluster and Potts models
After all, the sun is only a young star among thousands of millions of much older stars in our galaxy and the possible existence of such advanced civilizations is only a question of biological evolution doing its job, slowly but relentlessly through the millennia1 .
Brane Worlds, the Subanthropic Principle and the Undetectability Conjecture
But communication and computation are changing as the relentless application of Moore’s Law brings computation and information into the quantum realm.
Quantized Poker
For insolation driven runaways (or a planet sub ject to relentless bolide impact), the ultimate escape from a runaway greenhouse would be loss of water to space by disassociation due to photolysis and then escape of hydrogen to space.
The Runaway Greenhouse: implications for future climate change, geoengineering and planetary atmospheres
Haggstrom, O., Peres, Y.; Schonmann, R. H.: Percolation on Transitive Graphs as a Coalescent Process: Relentless Merging Fol lowed by Simultaneous Uniqueness in “Perplexing Probability Problems: Papers in Honor of Harry Kesten” (M.
Percolation on infinite graphs and isoperimetric inequalities