If you reconcile two beliefs, facts, or demands that seem to be opposed or completely different, you find a way in which they can both be true or both be successful.

If you are reconciled with someone, you become friendly with them again after a quarrel or disagreement.

If you reconcile two people, you make them become friends again after a quarrel or disagreement.

If you reconcile yourself to an unpleasant situation, you accept it, although it does not make you happy to do so.