SUPEREROGATION

[su.per.er.o.ga.tion] n [ML supererogation-, supererogatio, fr. supererogare to perform beyond the call of duty, fr. LL, to expend in addition, fr. L super- + erogare to expend public funds after asking the consent of the people, fr. e- + rogare to ask--more at right] (1526): the act of performing more than is required by duty, obligation, or need