Supererogate

v. i. [ imp. & p. p. Supererogated p. pr. & vb. n. Supererogating. ] [ L. supererogatus, p. p. of supererogare to spend or pay out over and above; super over, above + erogare to expend or pay out money from the public treasury after asking the consent of the people. See Super-, and Erogate, Rogation. ] 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. [ 1913 Webster ]

The fervency of one man in prayer can not supererogate for the coldness of another. Milton. [ 1913 Webster ]