G2643 καταλλαγή (katallagḗ)

KJV renderings: atonement, reconciliation(-ing)
Strong's definition: exchange (figuratively, adjustment), i.e. restoration to (the divine) favor
Derivation: from G2644 (καταλλάσσω);

From James Strong's public-domain dictionaries (G), JSON edition by OpenScriptures (CC-BY-SA). Every dotted-underline word in the text links here.