φιλοπονία
From LSJ
τὸ βέλτερον κακοῦ καὶ τὸ δίμοιρον αἰνῶ, καὶ δίκᾳ δίκας ἕπεσθαι, ξὺν εὐχαῖς ἐμαῖς, λυτηρίοις μηχαναῖς θεοῦ πάρα → I approve the better kind of evil, the two-thirds kind, and that, in accordance with my prayers, through contrivances bringing salvation at the god’s hand
English (LSJ)
ἡ,
A love of labour, industry, Pl.R.535d, Stoic.3.64, 171, Phld.Rh.1.115 S., TAM2(1).283 (Xanthus); καρτερία καὶ φ. Pl.Alc.1.122c; ἡ περὶ τὴν παιδείαν φ. Isoc. 1.45; pl., Id.15.291, Plb.8.10.6, etc.; ἡ τῶν δρόμων φ. laborious practice of... D.61.24; φ. ἐν τοῖς γυμνασίοις ib.26; so, as an event in competitions of ἔφηβοι, SIG1061.5 (Samos, ii A. D.).