ἀνηρεμήτως
From LSJ
Ὁ αὐτὸς ἔφησε τὸν μὲν ὕπνον ὀλιγοχρόνιον θάνατον, τὸν δὲ θάνατον πολυχρόνιον ὕπνον → Plato said that sleep was a short-lived death but death was a long-lived sleep
Russian (Dvoretsky)
ἀνηρεμήτως: безостановочно (κινεῖσθαι Sext.).