δουλεύειν (douleuein)
δουλεύειν is an Ancient Greek form of δουλεύω, meaning “be a slave”. It is the present active infinitive.
Found 219 times in the Ancient Greek texts on Socratos.
Where it is used
Thucydides, History of the Peloponnesian War 2.63.3: τάχιστ’ ἄν τε πόλιν οἱ τοιοῦτοι ἑτέρους τε πείσαντες ἀπολέσειαν καὶ εἴ που ἐπὶ σφῶν αὐτῶν αὐτόνομοι οἰκήσειαν· τὸ γὰρ ἄπραγμον οὐ σῴζεται μὴ μετὰ τοῦ δραστηρίου τεταγμένον, οὐδὲ ἐν ἀρχούσῃ πόλει ξυμφέρει, ἀλλ’ ἐν ὑπηκόῳ, ἀσφαλῶς δουλεύειν.
All forms of δουλεύω (conjugation table)
Source: Socratos (socratos.org), a free reader for Ancient Greek and Latin. Grammar from the Perseus Treebank and Morpheus; dictionary entries from Liddell-Scott-Jones, A Greek-English Lexicon (Perseus Digital Library, CC BY-SA). Counts are from the texts on Socratos.