ἀρχηγετεύω
From LSJ
Ἐς δὲ τὰ ἔσχατα νουσήματα αἱ ἔσχαται θεραπεῖαι ἐς ἀκριβείην, κράτισται → For extreme diseases, extreme methods of cure, as to restriction, are most suitable.
English (LSJ)
A to be chief leader, τῶν κάτω Hdt.2.123.
German (Pape)
[Seite 365] Anführer sein, gebieten, τινός Her. 2, 123.