Lewis & Short

dē-surgo, ĕre, v. n., to rise from any place; to rise (extremely rare).

  1. I. Prop.: certa desurgere parte, *Lucr. 5, 703: cenă, *Hor. S. 2, 2, 77.
  2. II. Transf., to go to stool, Scrib. Comp. 140 and 142; Plin. 28, 14, 59, § 211.