ἔννυχον

From LSJ

ἔκδοτον σεαυτὴν τῷ σύροντι ποταμῷ τῶν πραγμάτων ἐᾶσαι → abandon yourself to the eddying flow of events

Source

English (Strong)

neuter of a compound of ἐν and νύξ; (adverbially) by night: before day.

Russian (Dvoretsky)

ἔννῠχον: adv. Aesop. = ἔννυχα.