Lewis & Short

căco, āvi, ātum, āre, v. n. and a.,—κακάω, to go to stool, to be at stool.

  1. I. Neutr., Pompon. ap. Non. p. 84, 2: toto decies in anno, Cat. 23, 20; *Hor. S. 1, 8, 38; Mart. 12, 61, 10.
  2. II. Act., Pompon. ap. Non. p. 84, 1 (Com. Rel. p. 209 Rib.): canes odorem mixtum cum merdis cacant, Phaedr. 4, 17, 25; Mart. 3, 89.
    Also, to defile with excrement: cacata charta, Cat. 36, 1 and 20.