\Su`per*er"o*gate\, 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.
      The fervency of one man in prayer can not supererogate
      for the coldness of another.             --Milton.