ἀπιστητέον
From LSJ
αὐτάρκης ἔσῃ, ἂν μάθῃς τί τὸ καλὸν κἀγαθόν ἐστι → you will be contented with your lot if you learn what the honourable and good is
English (LSJ)
A one must mistrust, disbelieve, c. dat., Plb.4.41.8; of persons, Str.8.4.10, etc.; ἀ. ἡμῖν περί . . Hp.Cord.2.
Greek (Liddell-Scott)
ἀπιστητέον: ῥημ. ἐπίθ. τοῦ ἀπιστῶ, δεῖ ἀπιστεῖν, πρέπει τις νὰ ἀπιστῇ ἢ νὰ δυσπιστῇ, μετὰ δοτ., Πολύβ. 4. 41, 8, Στράβ. 362.
Spanish (DGE)
no hay que creer, hay que desconfiar c. dat. de cosa τῷ μεγέθει ... τῷ πλήθει Plb.4.41.8
•c. dat. de pers. ἡμῖν περί ... Hp.Cord.2, τῷ φήσαντι Str.8.4.10.