ὑπαποκινέω
From LSJ
τραχὺς ἐντεῦθεν μελάμπυγός τε τοῖς ἐχθροῖς ἅπασιν → he is a tough black-arse towards his enemies, he is a veritable Heracles towards his enemies
English (LSJ)
intr.,
A move off secretly or softly, sneak away, c. gen., τῆς ὁδοῦ Ar.Av.1011.
German (Pape)
[Seite 1182] intr., sich heimlich od. sacht davon machen, τῆς ὁδοῦ Ar. Av. 1012.