μεθετέον
From LSJ
συνετῶν μὲν ἀνδρῶν, πρὶν γενέσθαι τὰ δυσχερῆ, προνοῆσαι ὅπως μὴ γένηται· ἀνδρείων δέ, γενόμενα εὖ θέσθαι → it is the part of prudent men, before difficulties arise, to provide against their arising; and of courageous men to deal with them when they have arisen
English (LSJ)
one must let go, τοῦτον (v.l. τούτων) Pl.Ti.55d; one must set scot-free, τοὺς ἀνδροφονήσαντας Ph.2.298.
Greek (Liddell-Scott)
μεθετέον: ῥημ. ἑπιθ. τοῦ μεθίημι, δεῖ μεθιέναι, τούτων μὲν μεθετέον Πλάτ. Τίμ. 55D.
Russian (Dvoretsky)
μεθετέον: adj. verb. к μεθίημι.