D defs.my
Entry 1 sense Webster, 1913

Superadd

· Su·per·add · IPA /ˌsuːpəɹˈæd/
01 v. t. To add over and above; to add to what has been added; to annex, as something extrinsic.
imp. & p. p. Superadded; p. pr. & vb. n. Superadding
  1. 1.
    To add over and above; to add to what has been added; to annex, as something extrinsic.
    “The strength of any living creature, in those external motion, is something distinct from, and superadded unto, its natural gravity.” — Bp. Wilkins.
    “The peacock laid it extremely to heart that he had not the nightingale's voice superadded to the beauty of his plumes.” L'Estrange.