κατάρχειν
From LSJ
Μὴ φεῦγ' ἑταῖρον ἐν κακοῖσι κείμενον → Ne fuge sodalem, cum calamitas ingruit → Lass einen Freund in Schwierigkeiten nicht im Stich
Greek > English (Woodhouse Verbs Reversed)
(see also κατάρχω): begin, be first to do a thing, be the first to do a thing, start something of one's own