τριβέμεναι

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

French (Bailly abrégé)

inf. prés. Act. épq. de τρίβω.