de grave resonancia
From LSJ
καί τιν᾿ ὀίω αἵματί τ' ἐγκεφάλῳ τε παλαξέμεν ἄσπετον οὖδας ἀνδρῶν μνηστήρων, οἵ τοι βίοτον κατέδουσιν → and I think some one of the suitors that devour your property shall bespatter the vast earth with his blood and brains