sŭpĕr-addo, no perf., dĭtum, 3, v. a.,
to add over and above , to superadd (poet.; now usu. written separately): tumulo superaddite carmen, Verg. E. 5, 42: laurus superaddita busto, Prop. 2, 13, 33 (3, 5, 17): vitis, Verg. E. 3, 38.
super-addō or super addō —, ditus, ere, to add besides, superadd: tumulo carmen, V.: in exiguo laur...
An Elementary Latin Dictionary