ἀδοκήτως
From LSJ
ψυχῆς ἀγῶνα τὸν προκείμενον πέρι δώσων → to stand the appointed trial for his life, to stand the appointed struggle for life and death
French (Bailly abrégé)
adv.
à l'improviste.
Étymologie: ἀδόκητος.
Russian (Dvoretsky)
ἀδοκήτως: неожиданно (εὐτυχῆσαι Thuc.).