ἰσχυριστέον
From LSJ
κακῶς ζῆν κρεῖσσον ἢ καλῶς θανεῖν → better to live ignobly than to die nobly, better to live badly than to die well
English (LSJ)
A one must maintain stoutly, Pl.R.533a.
Greek (Liddell-Scott)
ἰσχῡριστέον: ῥημ. ἐπίθ. τοῦ ἰσχυρίζομαι, δεῖ ἰσχυρίζεσθαι, Πλάτ. Πολ. 533Α.