ἀήσσητος
From LSJ
καὶ κεραμεὺς κεραμεῖ κοτέει καὶ τέκτονι τέκτων, καὶ πτωχὸς πτωχῷ φθονέει καὶ ἀοιδὸς ἀοιδῷ → and potter is ill-disposed to potter, and carpenter to carpenter, and the beggar is envious of the beggar, the singer of the singer
English (LSJ)
Att. ἀήττητος, ον,
A unconquered, not beaten, Th.6.70, Lys.33.7, D.18.247, AP7.741 (Crin.), etc.; esp. of the Stoic sage, Zeno Stoic.1.53,etc. 2 unconquerable, Pl.R.375b, Phld.D.3Fr.88b.