διελεγκτέον
From LSJ
προγράψαντες οὖν τά τε θεωρήματα καὶ τὰ ἐπιτάγματα τὰ χρεῖαν ἔχοντα εἰς τὰς ἀποδείξιας αὐτῶν μετὰ ταῦτα γραψοῦμές τοι τὰ προκείμενα → having therefore written at the beginning the theorems and the postulates that are necessary for their proofs, we will then write out for you the propositions
English (LSJ)
one must refute, Plu.2.450b.
Greek (Liddell-Scott)
διελεγκτέον: ῥημ. ἐπίθ. τοῦ διελέγχω, Πλούτ. Ἠθ. 450.
French (Bailly abrégé)
adj. verb. de διελέγχω.
Spanish (DGE)
hay que refutar οὐ τοῦτο νῦν δ. Plu.2.450b.