τὸν ἴδιον κίνδυνον ὑποθείς → at his own risk
circumactĭo: ōnis, f. circumago.I Lit., a turning around, revolving (very rare): solis, Vitr. 9, 9, 15; Mart. Cap. 8, § 885.—*II Trop., of discourse, a turning, turn, compass, Gell. 17, 20, 4.