Lewis & Short

sŭper -fīo, fĭĕri, v. n., to be over and above, to be left, to remain (very rare; not in Cic.): edepol te vocem (ad cenam) libenter, si superfiat locus, Plaut. Ep. 3, 2, 10; id. Mil. 2, 4, 3; id. Stich. 4, 2, 12; id. Trin. 2, 4, 108: quae superfieri possunt, Col. 12, 1, 5.