infernas
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
infernas: ātis, adj. infernus,
I of or from the lower country, lowland (rare): abies, Plin. 16, 39, 76, § 197; Vitr. 2, 10: navicularii, Inscr. Orell. 1084: terra, Mart. Cap. 6, § 603.