ἐργαστικός
From LSJ
εἰ ἀποκρυπτόντων τῶν Μήδων τὸν ἥλιον ὑπὸ σκιῇ ἔσοιτο πρὸς αὐτοὺς ἡ μάχη καὶ οὐκ ἐν ἡλίῳ → if the Medes hid the sun, the battle would be to them in the shade and not in the sun
English (LSJ)
ή, όν,
A able to work, working, industrious, Hp.Prorrh.2.4 (Comp.), Pl.Men. 81e (v.l.), X.Mem.3.1.6 ; οἱ ἐ. the working men, Plb.10.16.1 : Comp., Phld.Oec.p.32J. 2 skilled in producing, c. gen, φωνῆς Epicur. Sent.Vat.45 : generally, productive, σωφροσύνης Phld.Mus.p.24K.; ὑγιείας Gp.11.2.6 ; ἡ ἐ. (sc. τέχνη) the art of manufacturing, c. gen., ἐρεοῦ προβλήματος, στήμονος καὶ κρόκης, Pl.Plt.280e, 281a ; τὸ τῆς τροφῆς ἐ. the organ that prepares food, the mouth, Arist.Pol.1290b27. II of a workman, ἱμάτια Lex.Mess. in Rh.Mus.47.412 (nisi ἐργατ-legend.).