ἐπιβροντάω
From LSJ
Χρὴ τῶν ἀγαθῶν διακναιομένων πενθεῖν ὅστις χρηστὸς ἀπ' ἀρχῆς νενόμισται → When a good man is hurt, all who would be called good must suffer with him
English (LSJ)
A thunder in response, Plu.Marc.12: impers., it thunders as well, Ps.-Gem.Calend.p.183W.
German (Pape)
[Seite 931] dazu donnern, Plut. Marcell. 12.