The Collaborative International Dictionary
Superadd \Su`per*add"\, v. t. [imp. & p. p. Superadded; p. pr. & vb. n. Superadding.] [L. superaddere. See Super-, and Add.] 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.
Wiktionary
vb. (present participle of superadd English)
Usage examples of "superadding".
For it seemed to the Mouser that at that point his pursuer paused for an instant while her blue-pied flesh drank up the other's pale green substance, superadding Ississi's fishy duties to her own dire hungers before coming again horrifically on.