Use 'magnanimous' to describe generosity from someone in power towards someone with less power. The queen was magnanimous in granting the villagers clemency.
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Beyond Obligation
'Magnanimous' implies kindness that is more generous than what is usual or expected. The magnanimous donor offered to cover all expenses for the children's education.
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Sportsmanship
Often used in sports to applaud someone who is gracious in victory or defeat. The athlete was magnanimous, praising even his rivals' performances.