1. The word "reconcile", which our translators adopted from the Vulgate, is simply the transliteration of the Latin reconcilio, to bring together again, to reunite or re-connect.  The verb to reconcile, and its noun reconciliation, have , however, come to possess now merely the idea of friendship after estrangement.

        (a) allasso, to change, to make other (allos) than it is.  Occ. Acts 6:14.  Rom 1:23.  1Cor. 15:51, 52. Gal. 4:20.  Heb. 1:12.  Always rendered "change".

        (b) diallassomai (passive), dia (Ap. 104. v) and allasso, to be changed or altered mutually (the force of dia) from one condition to another.  Occ. Matt. 5:24.

        (c) katallasso, kata (Ap. 104. x) and allasso, to change or exchange something (anything) arbitrarily; not as (b) by mutual consent, but as proceeding from one (the kata, implying from above). Occ. Rom. 5:10.  1Cor. 7:11.  2Cor. 5:18, 19, 20; and its noun.
            katallage, is a change or exchange for something else.  Occ. Rom. 5:11 (atonement); 11:15.
2Cor. 5:18, 19.

        (d) apokatallasso; intensive form of katallasso, the apo (Ap. 104. iv) indicating that whatever is intended by (c) is done completely and inviolably.  Occ. only in the Prison Epistles, Eph. 2:16.  Col. 1:20, 21.

        (e) hilaskomai.  Occ. Luke 18:13.  Heb. 2:17 (see notes in loc.)  As this word means to expiate, or make atonement for sins, and is confined to mediatorial aspects and offerings, it need not here be discussed.

        (a) diallassomai, Matt. 5:24, where is found the basic explanation of the meaning usually understood by "be reconciled", &c.; i.e. the change of feelings and relationships of estranged relatives; a mutual change of feelings between equals (a man and his "brother").

        (b) katallasso.  Rom. 5:10, &c.  Here is the proper meaning of the Greek word, as clothed in its
correspondent Latin dress, viz. re-united or re-connected to God.  Emphasized by the last clause, "having been reconciled" (re-connected).  Vital union restored by re-connection.

        Rom. 11:15, "the reconciling".  The meaning is unmistakable; the re-connection of "a world" is
the antithesis to the "casting away" of Israel.

        1Cor. 7:10, 11, "be reconciled"; i.e. connected again with her husband.  Here also the antithesis is
plain.

        2Cor. 5:18, 19, 20.  These verses paraphrased read, -- "... God, Who re-connected (or re-united)
us again to Himself, by means of Christ, and having given to us the ministry of the re-connection (re-uniting) a world to Himself, not reckoning (imputing) their transgressions to them; and having laid upon us (the responsibility or burden of) the message of the re-connection. On Christ's behalf therefore we are ambassadors ... be ye re-connected (united again) to God."  We see here, revealed in simple majesty, the sovereign grace of God in providing by virtue of "the precious blood of Christ" a means whereby the rebellious creature can be restored to the favor of the justly alienated Creator.  It is not an entreaty to "forgive" and "forget" everything on man's side, but a command to return to God by means of
the new connection, and by that means alone, viz. the new and living Way which God Himself provided through the death and resurrection of His Son (Acts 17:30, 31.  Heb. 10:19, 20).

        (c) apokatallasso.  Occ. Eph. 2:16.  Col. 1:20, 21.  In each case the force of apo prefixed to katallasso suggests and emphasizes the perfection of the re-connection.  So that on God's side all is complete.  Here again the graciousness of God is manifest. Who MADE PEACE by virtue of the blood of
Christ, and thus gave access by means of Him "by one Spirit unto the Father", to those who were far off and to those who were nigh.