ἐμπρηστής
From LSJ
κατ' ἀρχῆς γὰρ φιλαίτιος λεώς → people are always ready to blame the rulers, people are against authority, people were fond of anything by which they could call authority in question
English (LSJ)
οῦ, ὁ,
A one that burns, Aq.De.8.15; incendiary, Ptol.Tetr.165.
German (Pape)
[Seite 817] ὁ, der Anzünder, Brandstifter, Procl.