• Webster's Revised Unabridged Dictionary
    • a Hard-hearted Unsympathetic; inexorable; cruel; pitiless.
    • ***
Century Dictionary and Cyclopedia
    • hard-hearted Unfeeling; cruel; pitiless; inhuman; inexorable.
    • hard-hearted Synonyms See list under cruel.
    • ***
Chambers's Twentieth Century Dictionary
    • Hard-hearted having a hard or unfeeling heart: cruel
    • ***


  • Proverb
    “Soft words win hard hearts.”
  • Henry Wadsworth Longfellow
    “A torn jacket is soon mended; but hard words bruise the heart of a child.”
  • H. L. Mencken
    “As the arteries grow hard, the heart grows soft.”
  • Theodore Roosevelt
    “I think there is only one quality worse than hardness of heart and that is softness of head.”
  • Phyllis Mcginley
    “Sticks and stones are hard on bones aimed with angry art. Words can sting like anything but silence breaks the heart.”


Chambers's Twentieth Century Dictionary
A.S. heard; Dut. hard, Ger. hart, Goth. hardus; allied to Gr. kratys, strong.


In literature:

Richard believed her capable of this hard-hearted thing and went on loving her blindly in spite of it.
"The Master of Appleby" by Francis Lynde
Jerome's heart beat hard, yet he looked quite boldly at the door.
"Jerome, A Poor Man" by Mary E. Wilkins Freeman
They must either be very stupid, or very hard-hearted.
"Kindness to Animals" by Charlotte Elizabeth
It is hard to say what was in his heart, and better perhaps not to inquire.
"Boy Woodburn" by Alfred Ollivant
Stout hearts ye need in Italy, for rude And rough the Latin race, and hard to be subdued.
"The Aeneid of Virgil" by Virgil
Robert paused, and his heart beat rather hard.
"The Sun Of Quebec" by Joseph A. Altsheler
It's the hard hearts that get broken.
"Franklin Kane" by Anne Douglas Sedgwick
Now the abbess of Port Royal was no hard-hearted, despotic woman, delighting to display her power and to 'make scenes.
"The Red Book of Heroes" by Leonora Blanche Lang
How hard-hearted, how selfish must the contrast prove her!
"Henrietta Temple A Love Story" by Benjamin Disraeli
She looked above the dingy room and the tired faces of men and women, the hard hands and the struggling hearts.
"Standard Selections" by Various

In poetry:

'God! I thank thee,' said the Prophet;
'Hard of heart and blind was I,
Looking to the holy mountain
For the gift of prophecy.
"A Parable" by James Russell Lowell
It is hard for a man to tell
The hidden thought in his friend's heart,
And the thought in a man's own heart
Is a thing darker.
"Hearts Of Women" by Edward Powys Mathers
A little while, 'tis hard to part
From this Christ blessed here below,
Old year! and in thy aged heart
I hear thee sing so sweet and low.
"New Year" by Abram Joseph Ryan
O blessed bodie! whither art thou thrown?
No lodging for thee, but a cold hard stone?
So many hearts on earth, and yet not one
Receive thee?
"Sepulchre" by George Herbert
The king's proud heart grew hard apace;
He marked the suppliant throng,
And said, "Nay, they must here abide;
The weak must serve the strong."
"Out Of Egypt" by Horatio Alger Jr
When presses hard my load of care,
And other friends from me depart,
I want a friend my grief to share,
With faithful speech and loving heart.
"Friendship" by Joseph Horatio Chant

In news:

Listen up, marathoners: A group of researchers claim that running too hard or too long is bad for your heart.
Mitt Romney's hard-hearted twist on the Mormon work ethic .
Sisters Ann and Nancy Wilson are the creative spark behind Heart, a hard rock group who initially found success in the mid-'70s only to reach greater.
The Democrats' goal was never to fix anything, but rather to brand Republicans as hard -hearted defenders of the wealthy.
INTERVIEWS Hear So Cow's Heart-Bending Power-Pop Gem 'I Hardly Know You'.
Donald Kirkendall, an exercise physiologist at the University of North Carolina, will never forget the time he put a heart-rate monitor on a member of the United States rowing team and asked the man to row as hard as he could for six minutes.
Mitt Romney's hard- hearted twist on the Mormon work ethic.
Big- hearted 'Boy' is hard to resist.
The average person gains five pounds over the holidays, which can be hard on the heart.
The people at Volunteers of America work hard all year round to help families in need, and they rely on support from caring hearted people like William Raihl from Volunteers of America.
"Heaven, I'm in heaven / And my heart beats so that I can hardly speak".
Cook me delicious, hard-to-find-in-Austin food (all while dancing) and my heart is yours.
Vournakis' still life-style photos capture the hard-working heart of local plantations like Middleton Place.
Going from Maui to the heart of Texas is probably hard to wrap your mind around.
Hey, we all eat things that we know aren't the greatest for our heart health, but we try hard not to overdue.

In science:

Number partitioning is also one of Garey and Johnson’s six basic NP-hard problems that lie at the heart of the theory of NP-completeness [12, 13], and in fact it is the only one of these problems that actually deals with numbers.
Number partitioning as random energy model
It should be possible to exploit this similarity to gain new insights about these two excitable media (e.g., by doing experiments on the oxidation of CO on Pt(110) which might be hard to do on a human heart).
Spiral Turbulence: From the Oxidation of CO on Pt(110) to Ventricular Fibrillation
At the heart of our approach, we replace the usual hard membership assignment of spectral clustering by a soft, probabilistic assignment, which also presents the advantage to bypass a well-known complexity bottleneck of the method.
Soft Uncoupling of Markov Chains for Permeable Language Distinction: A New Algorithm
However, for such a general case, the proof gets complicated and it is hard to see the heart of the proof.
Topology and Uniqueness of Higher Dimensional Black Holes