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The firefighter's supererogatory bravery saved lives during the rescue mission.
Donating a large sum to the charity was a supererogatory gesture, beyond what anyone had anticipated.
Volunteering on weekends was considered a supererogatory act, as it wasn’t required by her job.
Her supererogatory efforts at work earned her a well-deserved promotion.
His supererogatory kindness towards strangers made him well-loved in the community.
