πουλβῖνον
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)
τό, = Lat.
A pulvinus, cushion, bolster, Sammelb. 1.10 (iii A.D.), dub.l. in Arr.Epict.3.23.35: also Dim. πουλβινάριον, prob. in Gloss.