ἐξεπίστασθαι
From LSJ
τίς δ' οἶδεν εἰ τὸ ζῆν μέν ἐστι κατθανεῖν, τὸ κατθανεῖν δὲ ζῆν κάτω νομίζεται → who knows if life is death, and if in the underworld death is considered life
Greek > English (Woodhouse Verbs Reversed)
(see also ἐξεπίσταμαι): know by heart, know how to