φθαστέον
From LSJ
Περὶ τοῦ ἐπέκεινα τοῦ νοῦ κατὰ μὲν νόησιν πολλὰ λέγεται, θεωρεῖται δὲ ἀνοησίᾳ κρείττονι νοήσεως → On the subject of that which is beyond intellect, many statements are made on the basis of intellection, but it may be immediately cognised only by means of a non-intellection superior to intellection
English (LSJ)
(φθάνω)
A one must anticipate, Herod.Med. ap. Orib.7.8.2.
Greek (Liddell-Scott)
φθαστέον: ῥηματ. ἐπίθ. τοῦ φθάνω, πρέπει τις νὰ προλάβῃ, Ὀρειβάσ. 131 Matth.