ἄρξαι (arxai)
ἄρξαι is an Ancient Greek form of ἄρχω, meaning “to begin; to rule, lead”. It is the aorist active infinitive.
Found 140 times in the Ancient Greek texts on Socratos.
Where it is used
Thucydides, History of the Peloponnesian War 1.81.5: κἀν τούτῳ οὐδὲ καταλύεσθαι ἔτι καλόν, ἄλλως τε καὶ εἰ δόξομεν ἄρξαι μᾶλλον τῆς διαφορᾶς.
All forms of ἄρχω (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.