Su·per·er·o·gate v. i. [imp. & p. p. Supererogated p. pr. & vb. n. Supererogating.]  To do more than duty requires; to perform works of supererogation; to atone (for a dificiency in another) by means of a surplus action or quality.
     The fervency of one man in prayer can not supererogate for the coldness of another.   --Milton.
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