ἐμπονέω
From LSJ
ἔνδον γὰρ ἁνὴρ ἄρτι τυγχάνει, κάρα στάζων ἱδρῶτι καὶ χέρας ξιφοκτόνους → yes, the man is now inside, his face and hands that have slaughtered with the sword dripping with sweat
English (LSJ)
A work on, [τῇ γῇ] Alciphr.3.25, cf. JHS33.338 (Macedonia, ii A.D.). II c. acc., elaborate, θεωρίαν Gal.4.760.