διελεγκτέον
From LSJ
οὐχ οὗτός ἐστιν ὁ τοῦ τέκτονος υἱός; οὐχ ἡ μήτηρ αὐτοῦ λέγεται Μαριὰμ καὶ οἱ ἀδελφοὶ αὐτοῦ Ἰάκωβος καὶ Ἰωσὴφ καὶ Σίμων καὶ Ἰούδας; → “Isn't he the carpenter's son? Isn't his mother's name Mary, and aren't his brothers Jacob and Joseph and Shimon and Judah? (Matthew 13:55)
English (LSJ)
A one must refute, Plu.2.450b.
Greek (Liddell-Scott)
διελεγκτέον: ῥημ. ἐπίθ. τοῦ διελέγχω, Πλούτ. Ἠθ. 450.