πευστέον
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)
(πυνθάνομαι) A one must inquire, Pl.Sph.244b.
Greek (Liddell-Scott)
πευστέον: ῥημ. ἐπίθ. τοῦ πυνθάνομαι, δεῖ πυνθάνεσθαι, Πλάτ. Σοφιστ. 244Β.
Russian (Dvoretsky)
πευστέον: adj. verb. к πυνθάνομαι.
Dutch (Woordenboekgrieks.nl)
πευστέον, adj. verb. van πεύθομαι of πυνθάνομαι, er moet nagevraagd worden.