γνωστέον
From LSJ
αἱ δὲ χολωσάμεναι πηρὸν θέσαν → but they in their wrath maimed him, but they in their wrath made him helpless, but they in their wrath made him blind
English (LSJ)
one must know, Pl.R.396a. Adj. γνωστέα, τά, things that must be known, Gal.17(2).1.
Greek (Liddell-Scott)
γνωστέον: ῥημ. ἐπίθ., πρέπει τις νὰ γνωρίσῃ, Πλάτ. Πολιτ. 396Α.
Spanish (DGE)
hay que conocer Pl.R.396a, Plot.5.1.1.
Greek Monotonic
γνωστέον: ρημ. επίθ. του γιγνώσκω, πρέπει κανείς να γνωρίσει, σε Πλάτ.
Russian (Dvoretsky)
γνωστέον: adj. verb. к γιγνώσκω.