ὑπαρκτέον
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)
A one must begin with, τι Pl.R.467c; τῶν ἴσων ὑ. αὐτῷ he must render equal initial services (to others), Aristid.Or.23(42).29.
Greek (Liddell-Scott)
ὑπαρκτέον: ῥηματ. ἐπίθ., πρέπει τις νὰ ἀρχίσῃ, τι Πλάτ. Πολ. 467C.
Greek Monotonic
ὑπαρκτέον: ρημ. επίθ. του ὑπάρχω, αυτό που πρέπει να αρχίσει, σε Πλάτ.
Russian (Dvoretsky)
ὑπαρκτέον: adj. verb. к ὑπάρχω.