ἐμπονέω
From LSJ
καὶ λέγων ὅτι Πεπλήρωται ὁ καιρὸς καὶ ἤγγικεν ἡ βασιλεία τοῦ θεοῦ· μετανοεῖτε καὶ πιστεύετε ἐν τῷ εὐαγγελίῳ → declaring “The time has been accomplished and the kingdom of God is near: start repenting and believing in the gospel!” (Μark 1:15)
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.
German (Pape)
[Seite 816] darin arbeiten, τινί, Alciphr. 3, 25.