χαλαστέον
From LSJ
Ἀναξαγόρας δύο ἔλεγε διδασκαλίας εἶναι θανάτου, τόν τε πρὸ τοῦ γενέσθαι χρόνον καὶ τὸν ὕπνον → Anaxagoras used to say that we have two teachers for death: the time before we were born and sleep | Anaxagoras said that there are two rehearsals for death: the time before being born and sleep
English (LSJ)
A one must relax, Herod.Med. in Rh.Mus.58.91, Gal.Sect.Intr.7.
Greek (Liddell-Scott)
χαλαστέον: δεῖ χαλᾶν, Σωρ. Ἐφ. ἔκδ. Erm. σ. 81.