Κύριε, βοήθησον τὸν δοῦλον σου Νῖλον κτλ. → Lord, help your slave Nilos ... (mosaic inscription from 4th-cent. church in the Negev)
P. and V. ἄβουλος, ἀσύνετος, Ar. and P. ἀνόητος; see foolish.
off one's guard: P. and V. ἀφύλακτος.