ἀκταῖος
From LSJ
μεγάλα ὠφελήσεσθε πρὸς ἱστορίαν τῶν κοινῶν → that will be of great benefit to you in order to understand public affairs
English (LSJ)
α, ον, (ἀκτή A)
A on the shore or coast, epith. of cities in Aeolis, Th.4.52: Ἀκταία (sc. γῆ), ἡ, old name of Attica, = ἀκτή (A) 1.2, Call. Fr.348, Paus.1.2.6. 2 dwelling on the coast, belonging thereto, ἰχθύες Hp.Aff.52; θεοί Orph.A.342; βάτραχοι Babr.25.6.
German (Pape)
[Seite 86] (ἀκτή), am Gestade gelegen; θίς, Dünen am Ufer, Bian. 2 (IX, 227); σπιλάδες Opp. H. 2, 127; πόλεις, Philostr.; ἐπωφελίη Qu. Maec. 7 (VI, 33), Hülfe, die Priap den Fischern am Ufer geleistet; θεοί Orph. Arg. 342. Daher kommt ἀκταία, der alte Name von Attika.