συναμύνω
From LSJ
δι' ἐρημίας πολεμίων πορευόμενος → he marched on without finding any enemy, his route lay through a country bare of enemies
English (LSJ)
[ῡ], fut.
A ξυναμῠνῶ E.IA62:—join in assisting, τινι l.c.:—Med., Eratosth.Cat.33, Ael.NA3.46.
German (Pape)
[Seite 999] mit abwehren, beistehen, Eur. I. A. 62.