• WordNet 3.6
    • n mercilessness inhumaneness evidenced by an unwillingness to be kind or forgiving
    • n mercilessness feelings of extreme heartlessness
    • ***
Century Dictionary and Cyclopedia
    • n mercilessness The quality of being merciless; want of mercy or pity.
    • ***
Chambers's Twentieth Century Dictionary
    • ns Mercilessness want of mercy
    • ***


  • Neil Kendall
    Neil Kendall
    “Some people follow their dreams, others hunt them down and beat them mercilessly into submission.”
  • Thomas H. Huxley
    “Science is simply common sense at its best--that is, rigidly accurate in observation, and merciless to fallacy in logic.”
  • Bertrand Russell
    “Thoughts is subversive and revolutionary, destructive and terrible; thought is merciless to privilege, established institutions, and comfortable habit.”


Chambers's Twentieth Century Dictionary
Fr. merci, grace—L. merces, mercedis, pay, in later L. also 'favour.'


In literature:

His hold was merciless.
"The Tidal Wave and Other Stories" by Ethel May Dell
For this, she was beaten mercilessly, which was a common sight on that plantation.
"Slave Narratives: A Folk History of Slavery in the United States" by Work Projects Administration
The only sound breaking the stillness of the shadowy chamber was the merciless, incessant tick-tack of the timepiece.
"A Love Episode" by Emile Zola
It should be treated mercilessly.
"The Last Shot" by Frederick Palmer
He quelled her resistance with merciless force.
"The Lamp in the Desert" by Ethel M. Dell
Mercer's eyes remained mercilessly fixed upon her.
"Rosa Mundi and Other Stories" by Ethel M. Dell
And young V. Vivian, who was merciless as a social philosopher but somewhat trusting as a man, took his jump with a will.
"V. V.'s Eyes" by Henry Sydnor Harrison
The merciless storm beats my unsheltered head.
"New Tabernacle Sermons" by Thomas De Witt Talmage
The briefness of the lucifers was merciful or merciless, as you like.
"54-40 or Fight" by Emerson Hough
A breach was made in the wall; the besiegers poured in; and a merciless massacre followed.
"An Illustrated History of Ireland from AD 400 to 1800" by Mary Frances Cusack

In poetry:

Oh! it was an awful sight
To see them struggling with all their might,
And Imploring God their lives to save
From a merciless watery grave.
"The Wreck of the 'Thomas Dryden' in Pentland Firth" by William Topaz McGonagall
WOE to the rich, and mercilessly-proud,
Who stops his ears against the beggar's cry!
Unheard, unpity'd, he shall cry aloud
From Hell's abyss, where he shall ever lie.
"Advice To Distribute To The Poor, According To Every One's Circumstances And Abilities" by Rees Prichard
Not the mad woman’s pain, but the willow
Is awaking my heart’s even sadness,
‘Cause, while lulling this pain on leaves’ pillows,
It was tired and cut by winds merciless.
""My Life's Burden..."" by Innokentii Fedorovich Annensky
Sometime before the firemen arrived,
Ten persons of their lives had been deprived,
By the choking smoke, and merciless flame,
Which will long in the memory of their relatives remain.
"Calamity in London" by William Topaz McGonagall
Mayhap you are youthful Hope,
Who arrives from time to time Cloaked in magic From a land unknown?
Merciless as Hope,
Sweetest joy you show us
For a moment, then Take it back and fly away.
"The Mysterious Visitor" by Vasily Andreyevich Zhukovsky
Then away went Medoo with his heart full of joy,
To gaze upon the face of his long-lost boy;
Who had been treated by the players mercilessly,
But was taken to the home of Madame Celeste.
"Little Popeet - the Lost Child" by William Topaz McGonagall

In news:

As one of the premier fake journalists on the planet, Stephen Colbert is struck by the reaction of those he mercilessly ridicules.
Not even the dead could rest in peace during Hurricane Sandy’s merciless rage.
Morrissey Goes on Colbert, Gets Teased Mercilessly (Video).
Having it your way doesn't often apply to light switches, which are mercilessly uniform.
The pairing of Titus Andronicus and Ceremony at the Irenic on Nov 10 was a mercilessly passionate, sweat-soaked and heartfelt showcase of the direction of modern punk music.
What is it with these high-powered screen legends coming out of semi-retirement long enough to dreck the halls by playing merciless mother figures.
A South African judge sentenced the triggerman in the 2010 honeymoon slaying of a Swedish bride to life in prison Wednesday, calling the shooter "a merciless and evil person" who deserved the maximum punishment for his crime.
Much credit should go to "Saturday Night Live," which mercilessly made him a joke for his ethics, his intelligence, his salty language and his hair.
In this action-packed western movie, an ex-slave sets out with his mentor to save his wife from a merciless plantation owner.
During one of Trampled by Turtles' six merciless live performances in two days at South by Southwest 2012, these Duluth monsters of folk lit a fire under the asses of a lively crowd on a broiling Friday afternoon in Austin.
Mike Wallace, the dogged, merciless reporter and interviewer who took on politicians, celebrities and other public figures in a 60-year career highlighted by the on-air confrontations that helped make.
BALTIMORE — The New York Yankees now must grudgingly acknowledge that these aren't the same Baltimore Orioles they used to knock around with merciless ease.
Fluorescent ceiling lights beat down mercilessly on the stage setting that purports to be an office break room but feels more like an anvil.
David Rockefeller 's memoir is hardly merciless on his father, but it is anything but loving.
While the torturing heat is so merciless it seems it could eat away at somebody 's soul, Texans players have hit the field for training camp everyday this week.

In science:

In 1918 an epidemic influenza started in Spain raided the world and reached Caracas “ One case, two, three, six, a hundred, on the Capitol it fell like fog, the raid swept mercilessly from outskirts to center” (my translation of a passage by Pocaterra ).
A procedure to Estimate the Fractal Dimension of Waveforms