ἀχρηστία
From LSJ
ἀλλ' ἐπὶ καὶ θανάτῳ φάρμακον κάλλιστον ἑᾶς ἀρετᾶς ἅλιξιν εὑρέσθαι σὺν ἄλλοις → even at the price of death, the fairest way to win his own exploits together with his other companions | but even at the risk of death would find the finest elixir of excellence together with his other companions | but to find, together with other young men, the finest remedy — the remedy of one's own valor — even at the risk of death
English (LSJ)
Ion. ἀχρηστίη, ἡ,
A uselessness, unfitness, Hp.Praec. 9, Pl.R.489b, AP15.38 (Comet.), Them.Or.26.326a. II non-usance of a thing, Pl.R.333d, Plu.2.135c.