To bring two accounts back into one truth — differences met, explained, and settled without erasure.
Latin reconciliare: re- (again) + conciliare (to bring together, to unite), from concilium (a council, an assembly), from calare (to call together); to reconcile is to call two accounts back into one assembly, the same calling that gives class its name.
To bring two accounts back into one truth, differences met and explained rather than erased. The root's assembly is the model: reconciliation is a calling-together, not a smoothing-over.