• WordNet 3.6
    • adj implacable incapable of being placated "an implacable enemy"
    • ***
Webster's Revised Unabridged Dictionary
    • Implacable Incapable of being relieved or assuaged; inextinguishable. "O! how I burn with implacable fire.""Which wrought them pain Implacable , and many a dolorous groan."
    • Implacable Not placable; not to be appeased; incapable of being pacified; inexorable; as, an implacable prince. "I see thou art implacable .""An object of implacable enmity."
    • ***
Century Dictionary and Cyclopedia
    • implacable Not placable; not to be appeased; not to be pacified or reconciled; inexorable: as, an implacable prince; implacable malice.
    • implacable Not to be relieved or assuaged.
    • implacable Synonyms Relentless, etc. (see inexorable), unappeasable, unforgiving, vindictive, pitiless, rancorous.
    • ***
Chambers's Twentieth Century Dictionary
    • adj Implacable im-plāk′a-bl not to be appeased: inexorable: irreconcilable
    • ***


  • Albert Camus
    “Absolute virtue is impossible and the republic of forgiveness leads, with implacable logic, to the republic of the guillotine.”
  • Albert Camus
    “If there is sin against life, it consists in hoping for another life and in eluding the implacable grandeur of this life.”
  • Thomas Fuller
    “The weakest and most timorous are the most revengeful and implacable.”


Webster's Revised Unabridged Dictionary
L. implacabilis,; pref. im-, not + placabilis,: cf. F. implacable,. See Placable


In literature:

I fear this stony king with his implacable eyes.
"Imaginations and Reveries" by (A.E.) George William Russell
His first act on reentering the Senate was to deliver an implacably bitter speech against the President.
"Marse Henry, Complete" by Henry Watterson
For, six months I will be your guardian, your friend, your teasing, implacable censor.
"Robert Elsmere" by Mrs. Humphry Ward
Cleveland was implacable, and, "in the most irregular manner," as Sir John declared, insisted upon another shot.
"Vivian Grey" by Earl of Beaconsfield, Benjamin Disraeli
My happiness, Madam, both here and hereafter, and the safety of all your implacable family, depend upon this moment.
"Clarissa, Volume 3 (of 9)" by Samuel Richardson
Cato, even when his opinion was asked on any other subject, pronounced, with implacable enmity, that Carthage should be destroyed.
"The Great Events by Famous Historians, Vol. 2" by Various
Once Kurt ran across the tireless and implacable Olsen.
"The Desert of Wheat" by Zane Grey
He drew his sword and assailed the foremost of the cavaliers with such implacable fury that they fell back.
"The Real America in Romance, Volume 6;" by John R. Musick
This the courtier in turn professed to relish, but henceforth became the secret and implacable enemy of the king.
"Beacon Lights of History, Volume IV" by John Lord
It is something to meet, year after year, the quiet implacability of the land.
"Great Possessions" by David Grayson

In poetry:

They love the road that leads to hell;
Then let the rebels die,
Whose malice is implacable
Against the Lord on high.
"Psalm XXXV: Now Plead My Cause, Almighty God" by Isaac Watts
Once worshipped Prime of Powers,
She still was the Implacable: as a beast,
She struck him down and dragged him from the feast
She crowned with flowers.
"Earth And Man" by George Meredith
Nor follow him, as childhood used of old,
By radiant seas, in those time-hallowed tales.
Only, at times, implacable and cold,
From this blind gloom, stand out the iron nails.
"The war Widow" by Alfred Noyes
Grim is the grip of the Machine
And everything we do
Designed implacably has been
Since earth was virgin new:
We strut our parts as they were writ,—
That's all there is to it.
"The Law Of Laws" by Robert W Service
I know my grieving is made thick by terror;
The bones of those I loved aren't fleshed by sorrow.
I mourn the deaths I've died and go on dying;
I fear the long, implacable tomorrow.
"An Old Lament Renewed" by Vernon Scannell
God! call up Thy legions to fight on the side of my love,
Let the seats of the mighty be cast down before him, O Lord,
Send strong wings of angels to shield him beneath and above,
Let glorious Michael unsheath his implacable sword.
"Invocation" by Edith Nesbit

In news:

New York has an implacable ghost like that, called Attica .
In Ron Currie Jr.'s 2007 debut novel God Is Dead, the author imagined a world in which God, stymied by an implacable "polytheistic bureaucracy," came to Africa in the human form of a Dinka woman, only to be bombed, starved, and eaten by dogs.
I'm speaking today to anyone thinking about moving from a home of many years to smaller quarters, especially those who have entered septuagenaria: It's an arduous, odious, bewildering endeavor, one governed by harsh and implacable realities.
The implacable hand of fate, and the efforts of a quiet, reclusive man to reclaim two young sisters from their harrowing past, are the major forces at play in this immensely affecting first novel.
My unflagging admiration for the enormity of her vocal prowess was continually tainted by my distaste for her implacable penchant for histrionic razzle-dazzle.
Implacable nemesis of Jay Cronley, the man who once wrote that his legs got colder than his arms, because there were more of them.
The film is set in Jerusalem's Hebrew University and deals with the implacable rivalry between two scholars of the Talmud, the complex and sacred text of the Jewish religious tradition.
If this history suggests anything, it is that Israelis, no less than other democratic peoples, are tempted by the illusion that lasting peace can be purchased by making concessions to tyrants who also happen to be implacable enemies.

In science:

For all practical purposes then we are implacably imprisoned in our cell of light.
The galaxy ancestor problem