ἀποτειχιστέον
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)
one must wall off: metaph., διαβολήν Them.Or.22.278a.
Greek (Liddell-Scott)
ἀποτειχιστέον: ῥηματ. ἐπίθ., πρέπει τις διὰ τειχῶν νὰ ἀποκλείσῃ, ἀποχωρίσῃ, νὰ ἐμποδίσῃ, μεταφ., διαβολὴν Θεμίστ. 278Α.
Spanish (DGE)
hay que separar por un muro fig. αὐτήν (διαβολήν) Them.Or.22.278a.