late 14c., "reconciliation," from Late Latin reparationem (nominative reparatio) "act of repairing, restoration," from Latin reparatus, past participle of reparare "restore" (see repair (v.1)). Meaning "act of repairing or mending" is attested from c.1400. Reparations "compensation for war damaged owed by the aggressor" is attested from 1921, from French réparations (1919).