ἐμβρενθύομαι

From LSJ

κοινὴ γὰρ ἡ τύχη καὶ τὸ μέλλον ἀόρατον → fortune is common to all, the future is unknown | fortune is common to all and the future unknown | fate is common to all and the future unknown

Source

Spanish (DGE)

castañetear los dientes, Gloss.2.83.