ἰσχυριστέον

From LSJ

καλῶς γέ μου τὸν υἱὸν ὦ Στιλβωνίδη εὑρὼν ἀπιόντ' ἀπὸ γυμνασίου λελουμένον οὐκ ἔκυσας, οὐ προσεῖπας, οὐ προσηγάγου, οὐκ ὠρχιπέδισας, ὢν ἐμοὶ πατρικὸς φίλος → Ah! Is this well done, Stilbonides? You met my son coming from the bath after the gymnasium and you neither spoke to him, nor kissed him, nor took him with you, nor ever once felt his balls. Would anyone call you an old friend of mine?

Source
Click links below for lookup in third sources:
Full diacritics: ἰσχῡριστέον Medium diacritics: ἰσχυριστέον Low diacritics: ισχυριστέον Capitals: ΙΣΧΥΡΙΣΤΕΟΝ
Transliteration A: ischyristéon Transliteration B: ischyristeon Transliteration C: ischyristeon Beta Code: i)sxuriste/on

English (LSJ)

one must maintain stoutly, Pl.R. 533a.

Greek (Liddell-Scott)

ἰσχῡριστέον: ῥημ. ἐπίθ. τοῦ ἰσχυρίζομαι, δεῖ ἰσχυρίζεσθαι, Πλάτ. Πολ. 533Α.

Greek Monotonic

ἰσχῡριστέον: ρημ. επίθ., αυτό για το οποίο κανείς πρέπει να δείξει επιμονή, σε Πλάτ.

German (Pape)

man muß behaupten, Plat. Rep. VII.533a.