παραφῠλᾰκ-ή · paraphylak-ē — LSJ
keeping securely, safeguarding, ἡ τῶν χρημάτων π. D.S. 17.71, cf. Peripl.M.Rubr. 19, POxy. 2121.75 (iii A.D.) ; watchfulness, ἐν λόγοις καὶ ἔργοις Hierocl. in CA 10p.436M.
police- or garrison-duty, Not.Arch. 4.20 (Cyrene, Aug.).
observation, καιρῶν Hp. Ep. 16.