ἀδιάσφαλτος
From LSJ
ἔκδοτον σεαυτὴν τῷ σύροντι ποταμῷ τῶν πραγμάτων ἐᾶσαι → abandon yourself to the eddying flow of events
English (LSJ)
ον, free from error, μέθοδοι Hero *Geep.164. Adv. ἀδιασφάλτως Ps.-Dioph.p.xxi H.
Spanish (DGE)
-ον infalible μέθοδον Hero Lib.Geep.164.