ἀνατρεπτέον
From LSJ
English (LSJ)
A one must overthrow, refute, Luc.Herm.49, Gal.4.620. 2 one must go back, return, Orib.Fr.142.
Greek (Liddell-Scott)
ἀνατρεπτέον: ῥηματ. ἐπίθ. τοῦ ἀνατρέπω, πρέπει τις νὰ ἀνατρέψῃ, νὰ ἀναιρέσῃ, ἀνατρεπτέον ἐκεῖνα τὰ ἤδη ὡμολογημένα Λουκ. Ἐρμότ. 49.