σειστής
From LSJ
Καὶ μὴν ὑπεραποθνῄσκειν γε μόνοι ἐθέλουσιν οἱ ἐρῶντες, οὐ μόνον ὅτι ἄνδρες, ἀλλὰ καὶ αἱ γυναῖκες. → After all, it is only those in love who are actually willing to die for another — not just men, but women as well. (Plato, Symposium 179b)
English (LSJ)
οῦ, ὁ, (σείω)
A earth-shaker, a kind of earthquake, Lyd. Ost.53.