The plan of this study is simple. We will look at a large number of sins, one by one, alphabetically. We will define the sin, describe it, and comment on it, along with noticing Scripture references on the particular entry. Some illustrations will be offered along with the description.
Most people dont frequently use these terms but they are good ones and they convey important meanings. When there is a difficulty between you and another person, are you slow to be appeased? When there has been a separation between people, are you unwilling to be reconciled? Bewarefor such sins do have eternal consequences!
You wont find implacable in most modern translations of the Bible but it refers to a sin described on the pages of Scripture. Implacable means impossible to placate or appease, and placate means to allay the anger of, especially by making concessions; appease. Another definition of implacable would be not to be appeased, mollified, or pacified.
Paul describes the difficult times of the last days and mentions various sins prevalent in society. He says that people will be unloving, irreconcilable, malicious gossips, and other sins (2 Timothy 3:3, NASB, NET Bible). The term irreconcilable is implacable in the KJV. The ESV has unappeasable here.
The Greek scholar W. E. Vine says that this comes from aspondos and means one who cannot be persuaded to enter into a covenant. Such a person will want to remain an enemy of those who offend them. They will be unwilling to try to solve issues of alienation. They would hold on to their grudges and maintain their bitterness. They will not be easily appeased. They will be implacable.
Once offended, an implacable person isnt willing to seek reconciliation. Jesus says that we are not to have this attitude. He said, If you are presenting your offering at the altar, and there remember that your brother has something against you, leave your offering there before the altar and go; first be reconciled to your brother, and then come and present your offering (Matthew 5:23-24). He says, Make friends quickly with your opponent at law (v. 25a). In other words, He urges reconciliation.
On other hand, if the other person is responsible for the alienation, Jesus gives detailed instructions on how to go to the sinful brother and seek his repentance and forgivenessand reconciliation (Matthew 18:15-20). Whether we are the offender or the offended, we should seek to reconcile. The implacable person wont desire the settling of disputes and wont be anxious to forgive the offender. Hell be content to remain in alienation.
As we see in the discussion under unforgiveness, we must be willing to forgive the offender who seeks forgiveness. Jesus plainly says to forgive him and not remain alienated (Luke 17:3-4). There must be no place for implacability or an irreconcilable attitude.
 The American Heritage College Dictionary.
 Random House Websters College Dictionary.
 Bauer, Arndt, Gingrich, and Danker have irreconcilable here (A Greek-English Lexicon of the New Testament).
 Expository Dictionary.